Looking Back on Happy Years in Chemistry - ACS Publications

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Organometallics 2010, 29, 4648–4681 DOI: 10.1021/om100948g

Looking Back on Happy Years in Chemistry† My father, Carl Herbert Seyferth (1894-1983), a chemist in Chemnitz, Germany, who specialized in dyestuff applications and in the (at the time) new area of synthetic detergents, and my mother, Elisabeth (Schuchardt) (1896-1980), were married in 1922. I made my debut on a very cold 11th of January in 1929. At that time my father worked for a German company, but a few years later changed to the National Aniline and Chemical Company, an American firm, to do technical service in Germany. National Aniline had begun development of synthetic detergents in the US and, in view of my father’s expertise in this area, they soon asked him to join their research laboratory in Buffalo, NY. This he did in the spring of 1933, and in September of that year my mother and I joined him. I was immediately enrolled in kindergarten, although I did not know a word of English. However, one learns a new language quickly when one is only 5 years old, and with the help of my patient kindergarten and first grade teachers, and the at times impatient urging of my fellow students, I learned English quickly. At the same time I kept up my spoken German at home and, thanks to my mother’s efforts, learned to read and write German. In my early years I did not consider chemistry as a career at all to my liking. On a visit to my father’s laboratory I was asked by one of his colleagues whether I would like to become a chemist. “No,” I replied, “it smells too much in here.” Fast forward, past grade and high school and several moves before I ended up again in Buffalo in 1947. In that year I began undergraduate studies at the University of Buffalo (UB). In those days UB was not yet a part of the New York state university system but was a private school, a “street car college” with no dormitories and not much doing on campus except for some fraternities and sororities. So, I lived in rented rooms in private homes near the university and made my own fun by playing soccer in the local German saloon league on weekends. But mainly I studied hard. I majored in chemistry more or less for lack of interest in other subjects (the smells did not bother me so much at that stage; in fact, I did my share of generating them in the lab). I became interested in organic chemistry, thanks to an excellent advanced course in that subject by Professor Howard Tieckelmann, and enjoyed Professor Emil Riegel’s course in industrial chemistry because of the field trips our class took to some of the then many chemical and chemistryrelated industries in the Niagara Falls/Buffalo frontier. The hard work paid off, and I graduated summa cum laude in June 1951. I applied to several universities for admission to graduate school, was accepted by all, and ended up at Harvard University in September 1951. Harvard in those days was a great place for graduate studies in chemistry, with famous chemists active in teaching and research: in organic chemistry, Robert Woodward, Paul Bartlett, Louis Fieser, and Gilbert Stork; in physical chemistry, George Kistiakowsky, E. Bright Wilson, Paul Doty, William Klemperer, and William Moffitt; in inorganic chemistry, Eugene Rochow and the new on the scene, soon to become †

Part of the Dietmar Seyferth Festschrift.

pubs.acs.org/Organometallics

Published on Web 10/14/2010

Figure 1. In Chemnitz, age 2 (unknown photographer).

Figure 2. As high school student, age 16 (unknown photographer).

famous Geoffrey Wilkinson; in analytical chemistry, James Lingane. In 1951, entering graduate students were required to take (and pass in three tries) qualifying examinations in the four r 2010 American Chemical Society

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Organometallics, Vol. 29, No. 21, 2010

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Figure 3. As a graduate student in Mallinckrodt Laboratory, Harvard University, 1953 (unknown photographer).

major fields of chemistry. In the case of the analytical chemistry exam, I experienced the shock of my first ever flunked exam (but passed it on the second try). Among the graduate students in the entering class in 1951 were F. Albert Cotton, Paul Schleyer, Albert J. Moscowitz, and Robert Kurland. For my research advisor I chose Professor Rochow in inorganic chemistry. I might have chosen Wilkinson if his interests in 1951 had included ferrocene, but the ferrocene story only started at Harvard in 1952, and in 1951 what he had to offer did not appeal to me. Rochow had joined Harvard some years earlier after a distinguished research career in organosilicon chemistry at the General Electric Co. Research Laboratory in Schenectady, NY. He had ongoing research projects in a number of fields (organic and inorganic silicon chemistry, organotin chemistry, broad-line NMR spectroscopy), but what intrigued me was his proposal to do research in fluorine chemistry. I had become interested in organofluorine chemistry at UB, where I had done a literature project on that subject. Rochow was pleased to hear of my interest and said, “Well, if you want to do something in fluorine chemistry, first we’ll have to build an electrolytic fluorine cell.” After a session in the library reading about the construction and operation of fluorine cells, I returned to his office and asked, “What else have you got?” I ended up with a project on the synthesis of siloxanes with group 14 element containing substituents on the silicon atoms, and so I became an organometallic chemist. The early 1950s was the time of the Korean War, and graduate students were being drafted for military service. To have at least an advanced degree should I get drafted, I obtained an M.A. from Harvard in 1953 (which required no dissertation, only course work). The Ph.D. research was fun and went well. Of special interest to me was the study of the reactions of diazomethane with chlorides of tin, germanium, and silicon in which CH2 insertion into the element-chlorine bond occurred via initial nucleophilic attack by the carbon atom of diazomethane at the group 14 atom. I finished writing my dissertation in October 1954. In those days financial support for graduate students, especially during the summer term, was scarce. To earn some money for the fall and spring terms, I spent the summer months of 1950, 1951, 1952, and 1953 working in industrial laboratories (National Aniline;now a division of Allied Chemical Corp.; in Port Chester, NY, and American Cyanamid Co. in Stamford, CT). This provided valuable experience: I learned new chemistry and procedures and gained some insight into industrial research. As my research progressed, I had to start thinking about what I wanted to do after I had obtained my Ph.D. I talked to various company interviewers who came to the Department to look over the current crop of advanced graduate students, since a career in industrial research was a possibility. I was

invited to visit some research laboratories. Of these, the silicone laboratories of the General Electric Company in Schenectady and Waterford, NY, and of the Dow Corning Corporation in Midland, MI, were of greatest interest to me, and I ended up accepting an offer from Dow Corning. During my last year at Harvard I had applied for a Fulbright Scholarship for a year’s study in Germany. When the application was successful, I wrote to Ernst Otto Fischer, a Privatdozent in Professor Walter Hieber’s Institute of Inorganic Chemistry at the Technische Hochschule in Munich to ask if he would accept me into his research group. He was glad to do so. This seemed like an ideal situation at the time. In 1952 Fischer and Pfab and Wilkinson and R. B. Woodward at Harvard had independently, on the basis of different experimental evidence, concluded that ferrocene, (C5H5)2Fe, which had been reported by two groups in the preceding year, had the novel sandwich structure. I knew Wilkinson and his students well, and he and Fischer appeared to be friendly competitors. So, a year with Fischer in Munich should have been very interesting and given me an opportunity for entering this new area. However, as it turned out, I was rather naive: before my ship docked in Bremerhaven, Wilkinson and Fischer were feuding and not good friends at all. This put me in a rather awkward position. However, during the course of the year Fischer and I became good friends, a friendship that endured until his death in 2007. (Fischer and Wilkinson sort of made up when they shared the Nobel Prize in Chemistry in 1973.) I must admit that I did not get much done in the lab during my year in Germany. But that year did give me more time to think more about my future than I had during my very busy years as a graduate student, and I was having second thoughts about my choice of an industrial career (vs an academic career). Dow Corning had graciously allowed me to postpone my start in the Midland laboratories for a year so that I could spend a year in Germany. Upon my return to the USA in September 1955, I reported for work at Dow Corning. Although my research in the laboratory was of interest to me, I decided that I had made the wrong choice. Within two months I was looking for an academic position. Finding one while in Midland did not seem very promising, so Professor Rochow very kindly took me back in his group at Harvard in order to give me a better chance to find a university appointment. My industrial career was a very short one. In March 1956 I was back at Harvard as a postdoc. Professor Rochow was in Austria on sabbatical leave, and Gordon (F. G. A.) Stone was minding his group. The postdoctoral year was great fun, and the research was very productive (mostly vinyl-metal chemistry). On August 25, 1956, a beautiful sunny day, Helena McCoy of Arlington, MA and I were married. I had met her first in

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Figure 4. Some inorganic chemists at the Technische Hochschule M€ unchen, summer 1955: (front row, left to right) E. O. Fischer, D. Seyferth, Gottfried Brendel (a Hieber student, discoverer of ( μ-S2)Fe2(CO)6), Walter Hafner (noted for the first preparation of dibenzenechromium); (rear row, left to right) R. Breu (a Hieber student), Erwin Weiss (a Hieber student who carried out X-ray structure determinations and dipole moment measurements for the Fischer group; later Professor at the University of Hamburg, wellknown for his X-ray powder diffraction structure determinations of organometallic compounds of the alkali and alkaline-earth metals), Robert Werner (a Hieber student). Reproduced courtesy of the Archives, Institute of Inorganic Chemistry, Technical University of Munich, Professor Dr. H. Schmidbaur, Director.

September 1951, when she was a freshman at Radcliffe College. She was taking freshman chemistry at Harvard and was in a first-year chemistry laboratory section for which I, as a new graduate student, happened to be the teaching assistant. In those days, TAs were not supposed to date their students, so our closer acquaintance was delayed a year. We became engaged in 1954 before I left for Germany. Helena majored in chemistry and for a year worked as a chemist in the Polaroid laboratories in Cambridge. Our three children, Eric, Karl, and Lisa, were born in 1957, 1960, and 1961, respectively. Helena stayed home while they were young, and later, after obtaining a masters degree in teaching, became a teacher in the Lexington school system. Academic positions, especially in inorganic chemistry, did not seem to be plentiful during my postdoctoral year at Harvard, but I did receive an offer from Ohio State University. I was about to accept it when Professor Arthur C. Cope, Head of the Department of Chemistry of the neighboring Massachusetts Institute of Technology (MIT), asked me to come over for a visit; it turned out that they were interested in hiring an inorganic chemist. Al Cotton, who had carried out his Ph.D. research under Wilkinson, had joined MIT two years earlier and wanted to have an inorganic chemist colleague. I went over to MIT, met some of the staff (Charles Coryell, Jack Irvine, both radiochemists), and gave a seminar on my postdoctoral research. An offer of an appointment as Instructor in Chemistry at an annual salary of $6000 soon followed. I was happy to accept. Klaus Biemann, James Ross, and I joined the MIT Chemistry Department in the fall of 1957 as the last Instructors to be hired. After that, “rank inflation” set in nationwide and Art Cope was forced to offer new junior staff candidates appointment as Assistant Professor. I was fortunate in my start in research at MIT. Two graduate students who had entered the Department in the fall of the

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Figure 5. With old friend and colleague F. A. Cotton, at MIT, early 1960s (unknown photographer).

Figure 6. Lecturing on research at DuPont in March 1962 (photo courtesy of DuPont Chambers Works).

previous year and still were uncommitted signed up with me, and I had immediate funding from the Office of Naval Research, which had a new program aimed at the synthesis of inorganic/organometallic polymers of high thermal stability. One of the students, Michael Weiner, worked on my vinylmetal project and discovered a new and useful procedure for the synthesis of vinylic and allylic lithium reagents. His results provided the start of a productive program of long duration in organolithium chemistry. The other student, Samuel Grim, carried out research based on the analogy of diazomethane and triphenylphosphinemethylene as carbon nucleophiles (an idea that came to me when I was listening to a lecture by Georg Wittig on his new phosphorus ylide chemistry during my year in Germany). Grim’s work was the start of a long program in my laboratory which dealt with aspects of organophosphorus chemistry. My interests initially focused on the organometallic chemistry of the main-group elements. However, my colleagues in the inorganic division, initially Al Cotton, and a bit later Alan Davison and Richard Holm, were transition-metal chemists. So, along the way I decided to give organotransition-metal chemistry a try. The unexpected isolation by one of my graduate students, Jeffrey Mui, of some purple crystals as a byproduct of the reaction of phenyl(bromodichloromethyl)mercury with

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dicobalt octacarbonyl provided an entry into organotransitionmetal chemistry. At first the identity of these crystals was a mystery, but then we found them to be a known compound, chloromethylidynetricobalt nonacarbonyl. Very little was known about this intriguing class of cobalt carbonyl cluster derivatives, so one of my other students, Ralph Spohn, began to investigate their synthesis and chemistry. These studies were very fruitful, and ultimately six Ph.D. dissertations and a Master’s thesis were devoted to developing their fascinating, often surprising chemistry. Even more fruitful were studies of di- and trinuclear iron carbonyl complexes with bridging sulfur-containing ligands. The idea that the chemistry of the S-S single bond in ( μ-S2)Fe2(CO)6 should be analogous to that of the S-S bond of organic disulfides provided the impetus for this work. This indeed was the case, as discovered by my student Richard Henderson, the lead man in this chemistry. One discovery led to another, and studies in this broad area provided new chemistry for 11 Ph.D. theses. My first co-worker from the People’s Republic of China, Professor Li-Cheng Song, also carried out work in this area at MIT. After his return to Nankai University in Tianjin, with my encouragement, he carried out further productive research on sulfur-ligand-bridged di- and multinuclear iron carbonyl complexes with a success that earned him election to the Chinese Academy of Sciences. In my research in the main-group element area, my students made some noteworthy advances. Mercury, although an element in periodic group 12, has been regarded as an honorary main-group element and for some years we were heavily engaged in organomercury research after my student James Burlitch discovered that compounds of the type PhHgCX2Br (X=Cl, Br) decomposed thermally at 80 °C, resulting in the extrusion of free dihalocarbenes, CX2, which could be trapped in situ by a variety of organic and inorganic substrates. Dihalocyclopropanes were readily available from CX2 addition to CdC bonds of olefins. Starting from one of these, 7,7-dibromonorcarane, my student Robert Lambert, on his own initiative, was led by way of conversion of this dihalide to an organosilicon derivative to the synthesis of the first silacyclopropane, a longsought class of organosilicon compounds. This started a new program on hyperreactive three-membered silacyclics, whose highlights were the synthesis by my student Dennis Annarelli of hexamethylsilacyclopropane, the thermolysis of which at 60-70 °C reversibly extruded dimethylsilylene, which could be trapped in situ by various substrates, and the isolation by my student Steven Vick of 1,1-dimethyl-2,3-bis(trimethylsilyl)-1-silacyclopropene, a compound which, due to high ring strain, was so reactive that on exposure to air bulk samples burst into flame. But enough of chemistry. Over the years I had many graduate student and postdoctoral co-workers who were outstanding; intelligent, innovative, original, motivated, enthusiastic, and hard-working. Many made important intellectual contributions. It gave me great joy and satisfaction to watch their progression to independent, self-confident researchers. 1968 was an eventful year both in the USA and Europe, and so it was for us. My family and I spent a seven-month sabbatical leave in Munich at the Technische Hochschule, again associated with E. O. Fischer. In a small Opel Kadett, with the children (aged 10, 7, and 6) in the back seat, we did a “Grand Tour” of Europe: Germany, Austria, France (during the countrywide strikes of spring 1968), Italy, The Netherlands. Memorable also were our annual summer vacations spent on Cape Cod on Amrita Island in Cataumet, always for the month of August some 13 years in a row. I came to the MIT office one day each week to stay on top of things and to “What’s New?” the students.


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Figure 7. At MIT in March 1972 (source: Duette Photographers (Arlington, MA)).

Figure 8. A Seyferth template (reproduced courtesy of Alfa Aesar).

During the course of my research career, I consulted for a number of chemical companies. Among these was Alfa Inorganics, a supplier of specialty chemicals for research. I also was a member of its Board of Directors. At one meeting the president, Steward Stafford, urged us to think of new products other than chemicals that Alfa might sell. Thinking of the well-known, very useful “Fieser Triangle” template, I suggested a template more useful to inorganic chemists, with representations of atomic orbitals and of the metallocene structure in addition to the usual organic ones. My suggestion was received favorably and I was appointed to design such a template. The result was the Seyferth template (Figure 8), which proved to be a popular item in the Alfa catalogue for use by students and by researchers. It was popular also in kindergarten and grade school for tracing the various figures. The template sold well for a number of years but ultimately was done in by ChemDraw.

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Figure 9. Cover of Issue No. 1, Volume 1, of the Journal of Organometallic Chemistry (copyright 1963, Elsevier; reproduced by permission).

My entry into journal editing was unexpected. Around 1961 Elsevier Publishing Company of Amsterdam, The Netherlands, announced its intention of starting the first journal devoted to organometallic chemistry and solicited comments from a number of organometallic chemists worldwide. In the 10 years since the discovery of the novel structure of ferrocene, organometallic chemistry, especially of the transition metals but also of the main-group elements, had blossomed and become a very active and popular field of research worldwide. So, a new journal that covered this area to me seemed to be a good idea. One day in 1962 Dr. W. Gaade, a representative of Elsevier, appeared unannounced in my office in MIT and told me about Elsevier’s intentions concerning this new venture: that it would be an international journal with five regional editors (for the UK, Germany, France, USSR ,and USA) with papers published in English, German, and French. He ended by telling me that I had been recommended as the regional editor for the USA and asked if I was interested and willing. I replied that I was. It was not long before the first manuscripts started arriving, and the first issue of the Journal of Organometallic Chemistry (JOMC) was published in October 1963 (Figure 9). The other JOMC Regional Editors were Colin Eaborn (UK, Australia, New Zealand, and the European manuscripts written in English), E. O. Fischer (manuscripts written in German), Henri Normant (France), and K. A. Andrianov (USSR, soon to be succeeded by Oleg Reutov). I ended up with all of the Western Hemisphere (mostly USA and Canada) and Asia (only Japan at the time). The problem

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with having five independent Regional Editors was that each one evaluated his manuscripts as he saw fit, which meant that there were five different ways of judging manuscript acceptability for publication in JOMC. This led to publication of some rather remarkable (i.e., remarkably bad) papers at times. I used the American system with which I was familiar: two or three referees, with rules that over time I made plain to my authors, a system that worked well to ensure high quality of the papers from my regional editorship. Elsevier allowed JOMC to grow as the press of new manuscripts required. They also allowed me to broaden the scope of their organometallic chemistry publishing effort. We added a separate reviews section, and R. Bruce King (University of Georgia) and I in 1964 started writing the Annual Surveys of Organometallic Chemistry series. We published two volumes by ourselves, with Bruce responsible for the transition and f element metals while I covered the main-group elements and the group 12 metals. After two years the job got to be too much for us and we sought the help of other authors. Eventually, both the reviews section and the annual surveys were incorporated into JOMC. Jan Noltes (Organisch Chemisch Instituut TNO, Utrecht, The Netherlands) and I also started a new journal, Organometallics in Chemical Synthesis, in 1970. The purpose was to have a venue in which the applications of organometallic compounds and reactions in organic synthesis could be published. This, of course, became a major area of organometallic and organic chemistry in later years, but it was not large enough in 1971 to sustain a separate journal. Since there appeared to be little interest on the part of authors or subscribers, we let the journal die after one volume. (This one-volume journal might be a rare collector’s item today.) I was a JOMC Regional Editor for 17 years. Starting in 1980 and becoming increasingly serious, there was a move among US inorganic/organometallic chemists to start an ACS journal devoted to organometallic chemistry because there was general dissatisfaction with the often poor quality of papers published in JOMC and with its high price. When it looked as if such a journal might become a certainty, Elsevier became worried and in November 1980 called a meeting of the regional editors at the Elsevier Sequoia offices in Lausanne, Switzerland. A brainstorming session concerning how we might deal with this threat to our monopoly in the field did not result in any useful ideas. Elsevier was not about to cut the subscription price, and achieving uniformity in the evaluation of manuscripts among the five regional editors that would ensure uniform high quality of published manuscripts seemed a remote possibility at best. I, of course, was not at all in favor of this new ACS journal and let my US colleagues know it. I feared that an ACS journal on organometallic chemistry would result in the loss of most of my US authors to the new journal and was rather worried about my future as editor. However, things turned out well. On December 16, Michael Bowen, Director of the ACS Books and Journals Division, and John Verkade of Iowa State University, a member of the ACS Committee on Publications, visited me in my office and offered me the position of editor of the ACS journal on organometallic chemistry. A chance to have sole charge of editorial policy in a noncommercial journal could not be resisted. I was glad to accept. In January 1981 we started from scratch. The name of the new journal was a problem in view of the existence of JOMC. I finally came up with Organometallics. This was a catchy, oneword title and the people at ACS liked it. So Organometallics it

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Figure 11. At age 60 (1989) (reproduced courtesy of MIT Libraries).

Figure 10. Cover of Issue No. 1, Volume 1 of Organometallics.

was christened. Blue is my favorite color so I chose a light blue background for the cover. Originally I suggested having ORGANOMETALLICS in white letters on a black field slatwise on the cover, but someone at ACS suggested the horizontal placement which was better. I did not know how many manuscripts we would be receiving, so I thought that one associate editor would be sufficient. The ideal candidate, an outstanding organometallic chemist, Richard Schrock, was a colleague in the MIT Chemistry Department. He was willing and so we were “go” and started receiving manuscripts in the spring of 1981. The first one to arrive was an organosilicon manuscript from Robert Cunico of Northern Illinois University, and his paper was the first in issue No. 1, which appeared in January 1982 (Figure 10). What I had feared as Regional Editor of JOMC came to pass. Almost all of my US authors switched from JOMC to Organometallics. Also we gained some new US authors who had refused to publish in a commercial journal. Some European authors who were willing to write their manuscripts in English and some of my Japanese authors also submitted manuscripts to Organometallics. As a result Organometallics was an instant journal with many new manuscripts right from the start. It also became a truly international journal. In recent years 75-80% of the papers published in Organometallics were submitted from countries other than the USA. Dick Schrock served as Associate Editor for eight years. He resigned in order to devote more time to his research, his workload having increased as manuscript submissions increased (from 571 in 1982 to 831 in 1990). This, in retrospect, was a wise decision, as attested by his 2005 Nobel Prize.

Figure 12. At MIT in my 70s (photo by Justin Knight; reproduced by permission).

As Organometallics grew, more Associate Editors were needed; today we have five. The Associate Editors who have followed Dick Schrock, Tobin Marks, Lanny Liebeskind, Maurice Brookhart, Dwight Sweigart, Kenton Whitmire, Manfred Bochmann, and Dennis Lichtenberger, have done an outstanding job to ensure and maintain the high quality of the manuscripts published in Organometallics. I retired in 1999 at age 70, becoming Professor Emeritus. I taught half-time for three more years and stayed on as editor of Organometallics. I used the free time that my retirement gave me to indulge my life-long interest in history by writing 12 long (and one shorter) essays on compounds or classes of compounds that have been important in the development of organometallic chemistry;a subject not familiar to and appreciated by many organometallic chemists. These were well received, and at present I am writing number 14. I am also writing a history of the MIT Chemistry Department. My wife also retired in 1999;she really retired from her job as a

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Figure 13. At the 1995 graduation of my last Ph.D. student, Pawel Czubarow (photo by Danuta Bujak; reproduced by permission).

Figure 14. TU Chemnitz 2007 (left to right): Professor Dr. Heinrich Lang, University Rektor Professor Dr. Klaus-Juurgen Matthes, Helena Seyferth, Dietmar Seyferth, Professor Dr. Karl Heinz Hoffmann (reproduced by permission of Technische Universit€at Chemnitz).

sixth-grade math teacher in Lexington, where we live. She claims that I “flunked” retirement since I’m still in my office at MIT every weekday. Not all of my writings have been serious in nature. No. 353 in my publication list has the innocuous title “The Generation of a Highly Reactive Intermediate in the HighTemperature Pyrolysis of Tetramethylsilane” but really is a spoof in which I, with a fictitious coauthor, J. J. Pudvin, report the isolation and reactions of pure silicon 3d orbitals. I presented this orally at an organosilicon conference at Iowa State University in 1975 to the great amusement of my audience. Then there also is the only partly published (anonymously, without my knowledge, in CHEMTECH) “Researchmanship, Or How to Get Your Ph.D. Without Actually Working”, written in my younger years and modeled on Stephen Potter’s Gamesmanship, Lifesmanship, and One-upmanship books which were very popular at Harvard in the 1950s. Here J. J. Pudvin made his first appearance. I have received a number of awards over the years. These are listed in my CV. The one that meant a lot to me was the award of a Dr. honoris causa from the Technische Universit€ at Chemnitz in 2007 (Figure 14). First of all, Chemnitz is my birthplace; second, my father after World War I spent a few

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Figure 15. With Helena and our granddaughter Julia (photo by Eric Seyferth; reproduced by permission).

Figure 16. MIT Inorganic Chemistry faculty, September 2001: (front row) Dan Nocera, Joseph Sadighi, Kit Cummins; (rear row) Dick Schrock, Steve Lippard, Dietmar Seyferth, Alan Davison (photo by Nancy Schrock; reproduced by permission).

years of study at the Technische Staatslehranstalt in Chemnitz, which later became the Technische Universit€ at. So now I have also retired as editor of Organometallics. The 28 years as editor have been busy and happy ones. Through my interactions with my associate editors, editorial advisory board members, authors, reviewers, and ACS staff members in Columbus, OH, and Washington, DC, I have gained many new friends. As mentioned earlier, I still have some writing that needs to be done, so I will continue going to my office at MIT but no longer full time. I have been at MIT 53 years. During these years I have enjoyed the good fellowship of many colleagues in the Chemistry Department, especially those of the Inorganic Chemistry Division. First there was Al Cotton, then came Alan Davison. Others followed after Al left for Texas A&M in 1971: Richard Holm, Richard Schrock, Mark Wrighton, Edward Solomon, Richard Lagow, Stephen Lippard, Hanno zur Loye, Christopher Cummins, Joseph Sadighi, Daniel Nocera, Jonas Peters, and Elizabeth Nolan. Looking back, these have been happy years.

Dietmar Seyferth Curriculum Vitae Personal Born: January 11, 1929 in Chemnitz (Sachsen), Germany Herbert Carl Seyferth (chemist)

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Elisabeth (Schuchardt) Seyferth Emigrated to the United States in September 1933; US citizen Married Helena Agnes McCoy of Arlington, Mass. August 25, 1956 Children: Eric Steven (b. 1957) Karl Dietmar (b. 1960) Elisabeth Mary (b. 1961) Education B.A. (summa cum laude) in chemistry, University of Buffalo, 1951 M.A., Harvard University, 1953 Ph.D. in chemistry, Harvard University, 1955 Thesis: “Organopolysiloxanes Containing Organometallic Substituents in the Side-Chains”Thesis supervisor: Professor Eugene G. Rochow Postdoctoral Appointments • Inorganic Chemistry Institute, Technische Hochschule M€ unchen;with Professor E. O. Fischer (Fulbright Scholarship), 1954-1955 • Department of Chemistry, Harvard University - with Professor E. G. Rochow and Dr. F. G. A. Stone, March 1956-July 1957 Industrial Experience • Summer research jobs at National Aniline Co. laboratory in Port Chester, NY (1950, 1951) and at American Cyanamid Co. laboratories in Stamford, CT (1952, 1953) • Research chemist, Dow Corning Corp., Midland, MI (September 1955-March 1956) • Consultant (longer periods): Akzo-Nobel, Ethyl Corp., PPG (Corpus Christi, TX), M&T Chemicals, Dow Chemical Co., Ventron Corp., Rh^ one-Poulenc, Flamel Technologies, Exxon (Linden, NJ), Ciba Geigy (Toms River, NJ) • Board of Directors, Alfa Inorganics Massachusetts Institute of Technology Career 1957 Instructor 1959 Assistant Professor 1962 Associate Professor 1965 Professor 1983 Robert T. Haslam and Bradley Dewey Professor 1999 Robert T. Haslam and Bradley Dewey Professor Emeritus Editorial Activities 1963-1981: founding Regional Editor (for the Western Hemisphere and Asia) of the Journal of Organometallic Chemistry; Coordinating Editor, Reviews Section; Co-editor, Annual Surveys Section of the Journal of Organometallic Chemistry 1982-2009: founding Editor-in-Chief of the American Chemical Society journal Organometallics; 2010, Editor Emeritus Editorial board memberships: Chemistry of Materials, Applied Organometallic Chemistry, Russian Chemical Bulletin, CRC Press Handbook of Chemistry and Physics Honors and Awards 1951 Phi Beta Kappa 1953 Sigma Xi 1953 Charles Lathrop Parsons Fellowship of the American Chemical Society


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1962-1966 Fellowship of the Alfred P. Sloan Foundation 1964 Distinguished Alumnus Award, College of Arts and Sciences, University of Buffalo 1968 John Simon Guggenheim Memorial Foundation Fellowship 1972 Frederic Stanley Kipping Award in Organosilicon Chemistry of the American Chemical Society 1977 Election to the Deutsche Akademie der Naturforscher Leopoldina, since 2008 German National Academy of Sciences 1978 Fellow, American Association for the Advancement of Science 1979 Dr. honoris causa, Universite Aix-Marseille III, France 1981 American Chemical Society Award for Distinguished Service in the Advancement of Inorganic Chemistry 1984 Senior Award of the Alexander von Humboldt Foundation 1987 Clifford C. Furnas Memorial Award of the State University of New York at Buffalo 1992 Dr. honoris causa, Universite Paul Sabatier, Toulouse, France 1995 Fellow, American Academy of Arts and Sciences 1996 American Chemical Society Award in Organometallic Chemistry 2001 Elected member of National Academy of Sciences (USA) 2003 Arthur C. Cope Senior Scholar Award (American Chemical Society) 2007 Dr. honoris causa, Technical University of Chemnitz (Germany) Memberships (Past and Present) American Chemical Society Gesellschaft Deutscher Chemiker Royal Society of Chemistry Materials Research Society American Ceramic Society Institute of Materials (Fellow) American Institute of Chemists (Fellow) International Council on Main Group Chemistry Research Professor Seyferth’s research during the past 40 years has been in the general area of organometallic chemistry of the main-group elements (principally Li, Mg, Zn, Hg, B, Si, Ge, Sn, Pb, and P) and transition metals (principally Co and Fe). The work has dealt with the synthesis and characterization of organometallic compounds, their reactivity (including mechanistic studies), and their applications, mainly in organic synthesis and materials chemistry. Recent work has in part dealt with the development of polymeric precursors whose pyrolysis results in useful nonoxide ceramics such as silicon carbide, nitride, carbonitride, and oxynitride, boron nitride, and aluminum nitride, as well as carbides, nitrides, silicides, and borides of the early transition metals. Major Research Achievements (1) Development of practical and broadly applicable routes for the synthesis of useful functional organolithium reagents via transmetalation reactions of heavy-metal (Sn, Pb) organometallics, including vinylic and allylic lithium reagents, Ph2P(X)CH2Li (X = O, S) and acyllithium reagents, RC(O)Li, which were

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prepared in situ by the carbonylation of RLi at -110 °C. The methodology involved has been widely used by others in organic synthesis, especially for CH2dCHLi and CH2dCHCH2Li. Selected References J. Am. Chem. Soc. 1961, 83, 3583. J. Org. Chem. 1980, 45, 2273. Isr. J. Chem. 1984, 24, 167. J. Org. Chem. 1991, 56, 5768. (2) Development of the phenyl(trihalomethyl)mercury reagents, PhHgCX3 (especially PhHgCCl2Br, PhHgCBr3, and PhHg CF3), as dihalocarbene precursors. Thermolysis of such reagents at 60-80 °C provides a “clean” source of CCl 2 and CBr 2 , so that CX 2 insertion even into unactivated paraffinic C-H bonds can be effected. Broad synthetic applications in organic and organometallic chemistry. Reference Acc. Chem. Res. 1972, 5, 65 (Review). (3) Broad development of the organic chemistry of RCCo3(CO)9 cluster complexes, including the ability of the CCo3(CO)9 cluster to stabilize an adjacent carbonium and acylium ion positively charged center. Reference Adv. Organomet. Chem. 1976, 14, 97-144 (Review). (4) Preparation and isolation of the first silacyclopropanes and silacyclopropenes and development of the unusual chemistry of these highly strained and hyperreactive silacycles, including the application of hexamethylsilacyclopropane as a practical dimethylsilylene precursor for use under mild conditions. Reference J. Organomet. Chem. 1975, 100, 237 (Review). (5) Development of the chemistry of (μ-S2)Fe2(CO)6, an inorganic mimic of organic disulfides and a precursor for the useful (μ-S-)2Fe2(CO)6 anion (a sulfur nucleophile) and of the versatile [(μ-CO)(μ-RS)Fe2(CO)6]- anions (iron-centered nucleophiles). Selected References Organometallics 1982, 1, 125. Organometallics 1989, 8, 430. Organometallics 1990, 9, 2662. Organometallics 1991, 10, 3363. J. Am. Chem. Soc. 1992, 114, 4594. (6) Generation of useful ceramics such as SiC, Si3N4, silicon carbonitride, and BN by pyrolysis of suitable processable polymeric precursors. This involved synthesis of new types of organosilicon and boron polymers with latent (reactive) functionality suitable for thermal cross-linking, so that on pyrolysis high yields of ceramics can be obtained and the destructive effect of evolved gases minimized. Pyrolysis mechanism studies. Chemical modification of existing preceramic polymers. References J. Am. Ceram. Soc. 1988, 71, C-194. J. Am. Ceram. Soc. 1990, 73, 2131. Chapter in Silicon-Based Polymer Science; American Chemical Society: Washington, DC, 1990; Adv. Chem. Ser. No. 224, 565-591 (Review).

Seyferth

J. Inorg. Organomet. Polym. 1992, 2, 59. J. Am. Ceram. Soc. 1992, 5, 75. (7) Preparation and functionalization of carbosilane dendrimers. Functionalization of the periphery of the dendrimers with (a) Group 4 metallocene substituents to obtain catalysts for R-olefin polymerization. (b) Water-solubilizing groups (-SO3 -Naþ, -NHMe2þCl-) to obtain synthetic micelles. (c) Tin hydride substituents (-SnBu2H) to obtain reagents useful for organic synthesis. References Organometallics 1994, 13, 2682. Organometallics 1995, 14, 5362. Publications • Over 500 research papers (articles, communications, and notes) • 62 reviews and book chapters, 13 studies on the history of chemistry • 43 patents Essays on the History of Organometallic Chemistry (D. Seyferth) (1) [(C2H4)PtCl3]-, the Anion of Zeise’s Salt, K[(C2H4)PtCl3] 3 H2O. Organometallics 2001, 20, 2. (2) Cadet’s Fuming Liquid and the Cacodyl Compounds of Bunsen. Organometallics 2001, 20, 1488. (3) Zinc Alkyls, Edward Frankland, and the Beginnings of Main Group Organometallic Chemistry. Organometallics 2001, 20, 2940. (4) Dimethyldichlorosilane and the Direct Synthesis of Methylchlorosilanes. The Key to the Silicones Industry. Organometallics 2001, 20, 4978. (5) Bis(benzene)chromium. 1. Franz Hein at the University of Leipzig and Harold Zeiss and Minoru Tsutsui at Yale. Organometallics 2002, 21, 1520. (6) Bis(benzene)chromium. 2. Its Discovery by E.O. Fischer and W. Hafner and Subsequent Work by the Research Groups of E.O. Fischer, H.H. Zeiss, F. Hein, C. Elschenbroich, and Others. Organometallics 2002, 21, 2800. (7) (Cyclobutadiene)iron Tricarbonyl;A Case of Theory Before Experiment. Organometallics 2003, 22, 2. (8) The Rise and Fall of Tetraethyllead. 1. Discovery and Slow Development in European Universities, 1853-1920. Organometallics 2003, 22, 2346. (9) The Rise and Fall of Tetraethyllead. 2. Organometallics 2003, 22, 5154. (10) Uranocene. The First Member of a New Class of Organometallic Derivatives of Uranium. Organometallics 2004, 23, 3562. (11) Alkyl and Aryl Derivatives of the Alkali Metals: Useful Synthetic Reagents as Strong Bases and Potent Nucleophiles. 1. Conversion of Organic Halides to Organoalkali-Metal Compounds. Organometallics 2006, 25, 2. (12) Alkyl and Aryl Derivatives of the Alkali Metals: Strong Bases and Reactive Nucleophiles. 2. Wilhelm Schlenk’s Organoalkali Metal Chemistry. The Metal Displacement and the Transmetalation Reactions. Metalation of Weakly Acidic Hydrocarbons. Superbases. Organometallics 2009, 28, 2.

Editorial

13 The Grignard Reagents. Organometallics 2009, 28, 1598. Special Lectureships, Visiting Professorships Visiting Professor, University of Bordeaux; May 1968. Visiting Professor, University of California at Davis; January 1970. Visiting Professor, University of Wisconsin; July 1970. Seydel-Wooley Lecturer, Georgia Institute of Technology; January 1971. Job Visiting Professor, Memorial University, St. John’s, Newfoundland; October 1972. McGregory Lecturer, Colgate University; May 2, 1974. Visiting Professor, Technical University of Berlin; June 1974. Japan Society for the Promotion of Science Visiting Professor; October 1975. Bicentennial Year Visiting Lecturer of the German Academic Exchange Service; July 1976. J. L. Carrico Lecturer, North Texas State University; November 30, 1976. Lyman Wood Memorial Lecturer, St. Louis University; April 27, 1977. Proctor and Gamble Lecturer, Technische Universit€ at M€ unchen; November 17, 1980. George A. Abbott Lectureship in Chemistry, University of North Dakota; March 1981. Frontiers in Chemical Research Lecturer, Texas A&M University; March 8-12, 1982. Harold A. Iddles Lecturer, University of New Hampshire; April 21, 22, 1982. R. N. Keller Memorial Lecturer, University of Colorado, Boulder; November 5, 1984. H. Martin Friedman Lecturer, Rutgers, State University of New Jersey, Newark; April 11, 1985. J. Clarence Karcher Lecturer, University of Oklahoma; October 31, 1985. Research Scholar Lecturer, Drew University (Madison, NJ); November 4, 1985. Visiting Professor, Nankai University, Tianjin, People’s Republic of China; July 1986. Oak Ridge National Laboratory Chemistry Division Distinguished Lecturer; September 9, 10, 1987. Paolo Chini Memorial Lecturer, 20th Congresso Nazionale di Chimica Inorganica, Pavia, Italy; September 16, 1987. Visiting Professor, University of Tsukuba, Tsukuba, Japan; January 1989. Henry G. Kuivila Lecturer (inaugural lecture), State University of New York at Albany; May 5, 1989. 3 M University Lecturer, University of Western Ontario; January 14-18, 1991. Arthur D. Vernon Lecturer, Northeastern University, April 29, 1993. National Science Council of Taiwan Visiting Lecturer, March 1994. Raymond Siedle Lecturer, Indiana University, November 19, 1997. Charles E. Reed Lecturer, Rensselaer Polytechnic Institute, April 29, 1999. Chemistry Research Promotion Center Visiting Lecturer, Taiwan, February/March 2005.


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(2) Group IV Chemistry Symposium, Inorganic Division, 147th National Meeting of the American Chemical Society, Philadelphia, April 8-9, 1964. (3) Vice Chairman, Gordon Research Conference on Organometallic Chemistry, Tilton School, New Hampshire, July 1972. (4) Chairman, Gordon Research Conference on Organometallic Chemistry, Tilton School, New Hampshire, July 1974. (5) Chairman-Elect, Organometallic Subdivision of the Inorganic Chemistry Division, American Chemical Society, 1975. (6) Chairman, Organometallic Subdivision of the Inorganic Chemistry Division, American Chemical Society, 1976. (7) Symposium on “New Applications of Organometallics to Organic Chemistry”, Inorganic Division, Centennial Meeting of the American Chemical Society, New York, April 7-9, 1976. (8) Member-at-Large of the Council, Gordon Research Conferences, 1977-1979. (9) Member, Board of Trustees, Gordon Research Conferences, 1977-1980; 1980-1983. (10) Member, Finance Committee, Gordon Research Conferences, 1978-1980. (11) International Advisory Committee, IXth International Conference on Organometallic Chemistry (Dijon, 1979). (12) International Advisory Committee, Xth International Conference on Organometallic Chemistry (Toronto, 1981). (13) Organizing Committee, XIth International Conference on Organometallic Chemistry (Atlanta, 1983). (14) Member, Indo-U.S. Workshop on Co-operative Research in Chemistry, Delhi, January 7-19, 1980. Chairman, Organometallic Chemistry Section. (15) Advisory Committee for Chemistry, National Science Foundation, October 1, 1987-September 30, 1990. (16) Richards Medal Award Committee, Northeastern Section of the American Chemical Society, 1986-1988 (chairman, 1987-1988). (17) Review Panel, Silicon Chemistry Research Program, Fonds zur F€ orderung der Wissentschaftlichen Forschung (Austrian Science Foundation) 1996-2002. (18) International Jury, Wittgenstein Prize and STARTProgram, Austrian Science Foundation, 1996-2005. (19) International Advisory Committee, XXIst International Conference on Organometallic Chemistry, Vancouver, July 2004. (20) International Advisory Committee, 14th International Symposium on Organosilicon Chemistry, W€ urzburg, August 2005. (21) International Advisory Committee, XXIInd International Conference on Organometallic Chemistry, Zaragoza, July 2006.

Publication List Research Publications 1952 1. Ionization of Organometallic Halides. J. Am. Chem. Soc., 74, 6306 (1952). K. Gingold, E. G. Rochow, D. Seyferth, A. C. Smith, Jr., and R. West. 1953

Organizational Work and Service (1) Organizing Committee, First International Symposium on Organometallic Chemistry, Cincinnati, June 1963.

2. The Electrolytic Dissociation of Dimethyltin Dichloride. J. Am. Chem. Soc., 75, 2877 (1953). E. G. Rochow and D. Seyferth.

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3. Compounds of the Dimethyltin Cation and their Similarity to Compounds of Divalent Tin and Lead. J. Am. Chem. Soc., 75, 3099 (1953). E. G. Rochow, D. Seyferth, and A. C. Smith, Jr. 1954 4. A New Preparation of Bis-cyclopentadienyl-Metal Compounds. J. Am. Chem. Soc., 76, 4179 (1954). J. M. Birmingham, D. Seyferth, and G. Wilkinson. 1955 5. The Preparation of Chloromethyl Derivatives of Germanium and Silicon by the Diazomethane Method. J. Am. Chem. Soc., 77, 907 (1955). D. Seyferth and E. G. Rochow. 6. The Reaction of Organotin Halides with Diazomethane. J. Am. Chem. Soc., 77, 1302 (1955). D. Seyferth and E. G. Rochow. 7. The Preparation of Polymerizable Silanes Containing Organometallic Substituents in the Side-Chains. J. Org. Chem., 20, 250 (1955). D. Seyferth and E. G. Rochow. 8. Organopolysiloxanes Containing Group IV Organometallic Substituents in the Side Chains. J. Polym. Sci., 18, 543 (1955). D. Seyferth and E. G. Rochow. 1957 9. Vinyl Derivatives of the Metals. I. Synthesis of Vinyltin Compounds. J. Am. Chem. Soc., 79, 515 (1957). D. Seyferth and F. G. A. Stone 10. The Vinyl Group in the Cleavage Series. Naturwissenschaften, 44, 34 (1957). D. Seyferth. 11. Vinyl Derivatives of the Metals. II. The Cleavage of Vinyltin Compounds by the Halogens and by Protonic Acids. J. Am. Chem. Soc., 79, 2133 (1957). D. Seyferth. 12. Vinyl Derivatives of the Metals. III. Vinylmercuric Halides. J. Org. Chem., 22, 478 (1957). D. Seyferth. 13. Vinyl Derivatives of the Group V Elements.Z. Naturforsch., 12b, 263 (1957). L. Maier, D. Seyferth, F. G. A. Stone, and E. G. Rochow. 14. Vinyl Derivatives of the Metals. IV. The Preparation of Vinylgermanium Compounds by the Grignard Method. J. Am. Chem. Soc., 79, 2738 (1957). D. Seyferth. 15. Vinyl Derivatives of the Metals. V. Free Radical Addition Reactions of Triethylvinyltin. J. Org. Chem., 22, 1252 (1957). D. Seyferth. 16. Neopentyl Group Analogs. I. The Preparation and Some Cleavage Reactions of Trimethylsilylmethyl-Substituted Tin Compounds. J. Am. Chem. Soc., 79, 5881 (1957). D. Seyferth. 17. Vinyl Derivatives of the Metals. VI. Preparation, Properties and Some Reactions of Trivinyl Compounds of Group V Elements.

Seyferth

J. Am. Chem. Soc., 79, 5884 (1957). L. Maier, D. Seyferth, F. G. A. Stone, and E. G. Rochow. 18. Cycloalkyl- and Secondary Alkyltin Compounds and their Cleavage by Iodine in Benzene Solution. J. Org. Chem., 22, 1599 (1957). D. Seyferth. 1958 19. Vinyl Derivatives of the Metals. VII. Preparation of Organotin Esters by Cleavage of Vinyltin Compounds. J. Org. Chem., 23, 116 (1958). A. Saitow, E. G. Rochow, and D. Seyferth. 20. Neopentyl Group Analogs. II. Tris(trimethylsilylmethyl) Compounds of Phosphorus, Arsenic, Antimony and Bismuth and their Derivatives. J. Am. Chem. Soc., 80, 1336 (1958). D. Seyferth. 21. The Hydroboration of Trimethylvinylsilane. J. Inorg. Nucl. Chem., 7, 152 (1958). D. Seyferth. 22. Verifica della struttura di alcuni composti organici del silicio per mezzo di misure di risonanza magnetica nucleare. Gazz. Chim. Ital., 88, 1267 (1958). D. Seyferth, S. Castellano, and J. S. Waugh. 1959 23. The Oxymercuration of Trimethylvinylsilane.Z. Naturforsch., 14b, 137 (1959). D. Seyferth and N. Kahlen. 24. The Preparation and Some Reactions of Vinyllithium. Chem. Ind. (London), 402 (1959). D. Seyferth and M. A. Weiner. 25. Preparation of Organosilicon- and Organotin-substituted Boranes and their Oxidation to Organosilicon- and Organotin-substituted Alcohols. J. Am. Chem. Soc., 81, 1844 (1959). D. Seyferth. 26. The Reaction of Triphenylphosphinemethylene with Metallic and Organometallic Halides: A New Method for the Preparation of Water-Soluble Organometallic Compounds. Chem. Ind. (London), 849 (1959). S. O. Grim and D. Seyferth. 27. Preparation and Some Reactions of Allyllithium. J. Org. Chem., 24, 1395 (1959). D. Seyferth and M. A. Weiner. 28. Di-n-butyldivinyltin.Org. Synth., 39, 10 (1959). D. Seyferth. 1960 29. Darstellung von Perfluorvinyl-Metall-Verbindungen. Angew. Chem., 72, 77 (1960). D. Seyferth, K. Br€ andle, and G. Raab. 30. (Iso)cyanides of Silicon, Germanium and Tin as Ligands in Iron Carbonyl Complexes. J. Am. Chem. Soc., 82, 1080 (1960). D. Seyferth and N. Kahlen. 31. A New Preparation of Triphenylphosphinemethylenes by the Reaction of Carbenes with Triphenylphosphine. J. Am. Chem. Soc., 82, 1510 (1960). D. Seyferth, S.O. Grim and T.O. Read. 32. Trimethyl(iso)cyanogermane and Trimethyltin (Iso)cyanide. J. Org. Chem., 25, 809 (1960). D. Seyferth and N. Kahlen.

Editorial

33. Preparation of Organosilicon-substituted Borazenes. J. Inorg. Nucl. Chem., 15, 99 (1960). D. Seyferth and H. P. K€ ogler. 34. The Reaction of Organolithium Reagents with Perfluorovinyl Derivatives of Tin and Silicon. Tetrahedron Lett., No. 22, 20 (1960). D. Seyferth, T. Wada and G. Raab. 35. Halomethyl Derivatives of Silicon, Germanium and Tin by the Diazomethane Method. Inorg. Synth., 6, 37 (1960). D. Seyferth and E. G. Rochow.


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48. The Preparation of Organolithium Compounds by the Transmetalation Reaction. III. Allyllithium and Methallyllithium. J. Org. Chem., 26, 4797 (1961). D. Seyferth and M. A. Weiner. 49. 4, 6-Dimethyl-1-hepten-4-ol. Org. Synth., 41, 30 (1961). D. Seyferth and M.A. Weiner. 50. The Action of Phenyllithium on Bromomethyl- and Iodomethyltriphenylphosphonium Halides. J. Org. Chem., 26, 4783 (1961). D. Seyferth, J. K. Heeren, and S. O. Grim.

1961 36. Synthesis and Isolation of Vinyllithium. Preparation from Lithium and Heavy Metal Vinyl Compounds. J. Org. Chem., 26, 563 (1961). E. C. Juenge and D. Seyferth. 37. The Nuclear Resonance Spectra of Allyllithium and Vinyllithium. J. Am. Chem. Soc., 83, 1306 (1961). C. S. Johnson, Jr., M. A. Weiner, J. S. Waugh, and D. Seyferth. 38. Studies in Phosphinemethylene Chemistry. I. Nucleophilic Displacement of Halide Ion in Metal Halides by Triphenylphosphinemethylene. A New Synthesis of Organometallicsubstituted Phosphonium Salts. J. Am. Chem. Soc., 83, 1610 (1961). D. Seyferth and S. O. Grim. 39. Studies in Phosphinemethylene Chemistry. II. Adducts of Triphenylphosphinemethylene with Boron Compounds. J. Am. Chem. Soc., 83, 1613 (1961). D. Seyferth and S. O. Grim. 40. Studies in Phosphinemethylene Chemistry. III. Triphenylphosphinechloromethylene. J. Am. Chem. Soc., 83, 1617 (1961). D. Seyferth, S. O. Grim, and T. O. Read. 41. Studies in Phosphinemethylene Chemistry. IV. The Reaction of Triphenylphosphinemethylene and Triphenylphosphinevinylmethylene with Phenylbromophosphines. J. Am. Chem. Soc., 83, 2055 (1961). D. Seyferth and K. A. Br€ andle. 42. Some Reactions of Triphenylarsinemethylene. J. Inorg. Nucl. Chem., 20, 73 (1961). D. Seyferth and H. M. Cohen. 43. Neopentyl Group Analogs. IV. Trimethylsilylmethyldichlorophosphine. J. Org. Chem., 26, 2604 (1961). D. Seyferth and W. Freyer. 44. Vinyl Derivatives of the Metals. IX. Cleavage Reactions of Perfluorovinyltin Compounds. J. Org. Chem., 26, 2934 (1961). D. Seyferth, G. Raab, and K. A. Br€ andle. 45. The Triphenylsilyltriphenylborate Anion and Its Germanium Analog. J. Org. Chem., 26, 3034 (1961). D. Seyferth, G. Raab, and S. O. Grim. 46. The Preparation of Organolithium Compounds by the Transmetalation Reaction. I. Vinyllithium. J. Am. Chem. Soc., 83, 3583 (1961). D. Seyferth and M. A. Weiner. 47. The Preparation of Organolithium Compounds by the Transmetalation Reaction. II. Ferrocenyllithium. Chem. Ind. (London), 1568 (1961). D. Seyferth and J. F. Helling.

1962 51. Vinyl Derivatives of Metals. XI. Reaction of Nucleophilic Reagents with Triethylperfluorovinylsilane. Inorg. Chem., 1, 7 (1962). D. Seyferth and T. Wada. 52. Vinyl Derivatives of Metals. XII. Some Perchlorovinylmercury Compounds. Inorg. Chem., 1, 185 (1962). D. Seyferth and R.H. Towe. 53. The Preparation of Organolithium Compounds by the Transmetalation Reaction. VI. Some Factors Affecting the Transmetalation Reaction. J. Am. Chem. Soc., 84, 361 (1962). D. Seyferth and M. A. Weiner. 54. A New Preparation of Dihalocarbenes by an Organometallic Route. J. Org. Chem., 27, 1491 (1962). D. Seyferth, J. M. Burlitch, and J. K. Heeren. 55. Triphenylgermyl-Substituted Ferrocenes and Related Compounds. New Syntheses of Ferrocenyl Lithium and Grignard Reagents. Inorg. Chem., 1, 227 (1962). D. Seyferth, H. P. Hofmann, R. Burton, and J. F. Helling. 56. Vinyl Derivatives of Metals. XIII. Some Addition Reactions of Triethylperfluorovinylsilane. The F19 Nuclear Resonance Spectra of the Triethylperfluorovinyl Derivatives of Silicon, Germanium and Tin and of Perfluorovinyltriethoxysilane. Inorg. Chem., 1, 232 (1962). D. Seyferth, T. Wada, and G. E. Maciel. 57. Concerning the Mechanism of Formation of Phenyl(trihalomethyl)-Mercurials. J. Am. Chem. Soc., 84, 1757 (1962). D. Seyferth and J. M. Burlitch. 58. Concerning the Mechanism of Formation of Triphenylphosphinealkylidenes. J. Am. Chem. Soc., 84, 1764 (1962). D. Seyferth, J. K. Heeren and W. B. Hughes. 59. Borazine Derivatives. II. A Carbon-Bridged Bisborazine Compound. Inorg. Chem., 1, 710 (1962). D. Seyferth, W. R. Freyer, and M. Takamizawa. 60 Vinyl Derivatives of Metals. XIV. Reaction of the Trimethylvinyl Compounds of Silicon, Germanium and Tin with Iodomethylzinc Iodide. Preparation of Cyclopropyltin Compounds by the Grignard Procedure. Inorg. Chem., 1, 913 (1962). D. Seyferth and H. M. Cohen. 61. The Preparation of Organolithium Compounds by the Transmetalation Reaction. V. Perfluorovinyllithium.

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J. Am. Chem. Soc., 84, 4266 (1962). D. Seyferth, D. E. Welch, and G. Raab. 1963 62. A New and Convenient Route to Organofunctional Phosphine Oxides and Sulfides. J. Am. Chem. Soc., 85, 642 (1963). D. Seyferth, D. E. Welch, and J. K. Heeren. 63. Stepwise Reduction of gem-Dihalocyclopropanes with Trin-butyltin Hydride. J. Org. Chem., 28, 703 (1963). D. Seyferth, H. Yamazaki and D. L. Alleston. 64. Trimethylsilyl-, Trimethylgermyl-, and Trimethylstannylbenzene Chromium Tricarbonyl. Inorg. Chem., 2, 417 (1963). D. Seyferth and D. L. Alleston. 65. The Cleavage of Hexamethyldisiloxane and Hexamethyldigermoxane by Methyllithium: A Convenient Preparation of Lithium Trimethyl-silanolate and Lithium Trimethylgermanolate. Inorg. Chem., 2, 418 (1963). D. Seyferth and D. L. Alleston. 66. Vinyl Derivatives of Metals. XVII. Radical Additions to B-Trivinyl-N-triphenylborazine. J. Org. Chem., 28, 1142 (1963). D. Seyferth and M. Takamizawa. 67. The Reaction of Phenyl(trihalomethyl)mercurials with Olefins of Low Reactivity toward Dihalocarbenes. J. Org. Chem., 28, 1163 (1963). D. Seyferth, R. J. Minasz, A. J.-H. Treiber, J. M. Burlitch, and S. R. Dowd. 68. The Preparation of Organolithium Compounds by the Transmetalation Reaction. VI. Cyclopropyllithium. Inorg. Chem., 2, 625 (1963). D. Seyferth and H. M. Cohen. 69. Cyclopropyltin Halides and Related Compounds. Inorg. Chem., 2, 652 (1963). D. Seyferth and H. M. Cohen. 70. Vinyl Derivatives of Metals. XVI. Addition of Silicon and Tin Hydrides to B-Trivinyl-N-triphenylborazine. Inorg. Chem., 2, 731 (1963). D. Seyferth and M. Takamizawa. 71. The Hydroboration of Some Unsaturated Organosilicon Compounds. Inorg. Chem., 2, 734 (1963). D. Seyferth, H. Yamazaki, and Y. Sato. 72. The Transmetalation Reaction as a Source of New Organolithium Reagents. A Review of Recent Work at M.I.T. Bull. Soc. Chim. France, 1364 (1963). D. Seyferth, M. A. Weiner, L. G. Vaughan, G. Raab, D. E. Welch, H. M. Cohen, and D. L. Alleston. 73. The Reaction of Benzyne with Methyldiphenylphosphine: a New Route to Triphenylphosphinemethylene. J. Org. Chem., 28, 2463 (1963). D. Seyferth and J. M. Burlitch. 74. The Preparation of Dihalomethyl Derivatives of Carbon, Silicon and Germanium by the Action of Phenyl(trihalomethyl)mercurials on C-H, Si-H and Ge-H Linkages. J. Am. Chem. Soc., 85, 2667 (1963). D. Seyferth and J. M. Burlitch. 75. The Stability of Cyclopropyllithium in Diethyl Ether and in Tetrahydrofuran.

Seyferth

J. Organomet. Chem., 1, 15 (1963). D. Seyferth and H. M. Cohen. 76. Vinyl Derivatives of Metals. XVIII. Preparation, Characterization and Isomerization of Propenyl Derivatives of Silicon, Germanium and Tin. J. Organomet. Chem., 1, 138 (1963). D. Seyferth and L. G. Vaughan. 77. The Isomeric 1-Propenyllithium Reagents: Their NMR Spectra and the Stereochemistry of Their Formation by the Direct Reaction and by the Transmetalation Reaction. J. Organomet. Chem., 1, 201 (1963). D. Seyferth and L. G. Vaughan. 1964 78. CH2 Transfer from Halomethylmercury Compounds to Olefins. J. Am. Chem. Soc., 86, 121 (1964). D. Seyferth, M. A. Eisert, and L. J. Todd. 79. The Reaction of Vinyllithium with Tetraphenylphosphonium Bromide and the Formation of Phosphinemethylenes by RLi Addition to Vinylphosphonium Halides. J. Am. Chem. Soc., 86, 307 (1964). D. Seyferth, J. S. Fogel, and J. K. Heeren. 80. Synthesis of B-Organofunctional Borazine Derivatives. A Review of Recent Work at the Massachusetts Institute of Technology. Adv. Chem. Ser., No. 42, 259 (1964). D. Seyferth, H. P. K€ ogler, W. R. Freyer, M. Takamizawa, H. Yamazaki, and Y. Sato. 81. The Preparation of Organolithium Compounds by the Transmetalation Reaction. VII. cis- and trans-Propenyllithium: The Stereochemistry of the Transmetalation Reaction. Isopropenyllithium. J. Am. Chem. Soc., 86, 883 (1964). D. Seyferth and L. G. Vaughan. 82. The Reaction of Triphenylphosphine Oxide with Alkyllithium and Grignard Reagents. J. Am. Chem. Soc., 86, 1100 (1964). D. Seyferth, D. E. Welch, and J. K. Heeren. 83. The Preparation of Organolithium Compounds by the Transmetalation Reaction. VIII. β-Styryllithium. J. Organomet. Chem., 1, 437 (1964). D. Seyferth, L. G. Vaughan and R. Suzuki. 84. The Reaction of Triphenylphosphine Sulfide with Alkyllithium Reagents. J. Organomet. Chem., 2, 1 (1964). D. Seyferth and D. E. Welch. 85. Studies in Phosphinemethylene Chemistry. IX. The Reaction of Organolithium Reagents with tert-Butyltriphenylphosphonium Bromide. J. Organomet. Chem., 2, 101 (1964). D. Seyferth, M. A. Eisert, and J. K. Heeren. 86. Concerning the Mechanism of the Reaction of Phenyl(trihalomethyl) mercurials with Olefins. J. Am. Chem. Soc., 86, 2730 (1964). D. Seyferth and J. M. Burlitch. 87. Dihalomethylenation of Protonic Acids with Phenyl(trihalomethyl) mercury Compounds. J. Am. Chem. Soc., 86, 2961 (1964). D. Seyferth, J. Y.-P. Mui, and L. J. Todd. 88. Phenyl(dihalomethyl)mercury Compounds. The Reaction of Organotin and Organosilicon Hydrides with Halomethylmercury Compounds.

Editorial

J. Organomet. Chem., 2, 282 (1964). D. Seyferth, H. D. Simmons, Jr., and L. J. Todd. 89. Borazine Derivatives. V. Phosphorus-substituted Borazines. J. Organomet. Chem., 2, 367 (1964). D. Seyferth, Y. Sato, and M. Takamizawa. 90. Preparation and Reactions of 1,2-Bis(trimethyltin)tetraphenylbenzene and Related Compounds. A Novel Bimolecular Elimination of Trimethyltin Iodide. J. Organomet. Chem., 2, 417 (1964). D. Seyferth, C. Sarafidis, and A. B. Evnin. 91. The Preparation of Organolithium Compounds by the Transmetalation Reaction. IX. Benzyllithium. J. Organomet. Chem., 2, 431 (1964). D. Seyferth, R. Suzuki, C .J. Murphy, and C. R. Sabet. 1965 92. A New Method of Dihalocarbene Generation Based on Trihalomethylmetal Compounds. J. Am. Chem. Soc., 87, 681 (1965). D. Seyferth, J. Y.-P. Mui, M. E. Gordon, and J. M. Burlitch. 93. Tetraphenylbenzyne. J. Org. Chem., 30, 649 (1965). D. Seyferth and H. H. A. Menzel. 94. Synthesis of Monohalocyclopropanes and 1-Haloolefins via Phenyl(dihalomethyl)mercury Compounds. J. Organomet. Chem., 3, 337 (1965). D. Seyferth, H. D. Simmons, Jr., and G. Singh. 95. Propenyl-Metal Compounds. Rec. Chem. Prog., 26, 87 (1965). D. Seyferth. 96. Studies in Phosphinemethylene Chemistry. X. The Reaction of Organolithium Reagents with Alkyltriphenylphoshonium Halides. The Mechanism of Phosphinemethylene Formation. J. Am. Chem. Soc., 87, 2847 (1965). D. Seyferth, W. B. Hughes, and J. K. Heeren. 97. Studies in Phosphinemethylene Chemistry. XI. The Reaction of Alkyllithium Reagents with Tetraphenylphosphonium Bromide. J. Am. Chem. Soc., 87, 3467 (1965). D. Seyferth, W. B. Hughes, and J. K. Heeren. 98. The Reaction of Halomethylzinc Halides with Triethylsilane. J. Organomet. Chem., 4, 18 (1965). D. Seyferth, H. Dertouzos, and L .J. Todd. 99. Studies in Phosphinemethylene Chemistry. XII. Triphenylphosphine-t-butylmethylene and Triphenylphosphinetrimethylsilylmethylene. J. Am. Chem. Soc., 87, 4156 (1965). D. Seyferth and G. Singh. 100. Halomethyl-Metal Compounds. I. Preparation of Phenyl(trihalomethyl)mercury Compounds. J. Organomet. Chem,., 7, 127 (1965). D. Seyferth and J. M. Burlitch. 101. Halomethyl-Metal Compounds. II. The Preparation of gem-Dihalocyclopropanes by the Reaction of Phenyl(trihalomethyl)mercury Compounds with Olefins. J. Am. Chem. Soc., 87, 4259 (1965). D. Seyferth, J. M. Burlitch, R. J. Minasz, J. Y.-P. Mui, H. D. Simmons, Jr., A. J.-H. Treiber, and S. R. Dowd. 1966 102. A Novel Cleavage of Carbodiimides by Phenyl(bromodichloromethyl)mercury.


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Tetrahedron Lett., 189 (1966). D. Seyferth and R. Damrauer. 103. The Lithium Metal Induced Isomerization of Propenyl Derivatives of Tin, Silicon and Germanium. J. Am. Chem. Soc., 88, 286 (1966). D. Seyferth, R. Suzuki, and L. G. Vaughan. 104. Halomethyl-Metal Compounds. III. The Reaction of Phenyl(trihalomethyl)- and Phenyl(dihalomethyl)mercury Compounds with Trialkyl Phosphites. J. Organomet. Chem., 5, 185 (1966). D. Seyferth, J. Y.-P. Mui, and G. Singh. 105. Studies in Phosphinemethylene Chemistry. XIII. Routes to Triphenylphosphinehalomethylenes and -dihalomethylenes. J. Organomet. Chem., 5, 267 (1966). D. Seyferth, J. K. Heeren, G. Singh, S. O. Grim, and W. B. Hughes. 106. 100 Megacycle Nuclear Magnetic Resonance Spectra of Tetra-trans-propenyltin, trans-Propenyltrimethylgermane and trans-β-Styryltrimethyltin. J. Organomet. Chem., 5, 295 (1966). L. G. Vaughan and D. Seyferth. 107. CCl2 Insertion into Tetraalkylsilicon and -tin Compounds via Phenyl(bromodichloromethyl)mercury. J. Organomet. Chem., 5, 389 (1966). D. Seyferth and S. S. Washburne. 108. The Insertion of Halocarbenes into the MercuryHalogen Bond. J. Am. Chem. Soc., 88, 1831 (1966). M. E. Gordon, K. V. Darragh, and D. Seyferth. 109. Reactions of Organoboron Compounds with Phenyl(bromodichloromethyl)mercury. The Conversion of CnTerminal Olefins to C2nþ1-Internal Olefins. J. Am. Chem. Soc., 88, 1834 (1966). D. Seyferth and B. Prokai. 110. The Preparation of Diarylcyclopropenones by the Reaction of Phenyl(bromodichloromethyl)mercury with Diarylacetylenes J. Org. Chem., 31, 1660 (1966). D. Seyferth and R. Damrauer. 111. The Reaction of the Isomeric Propenylmercuric Bromides with Metallic Lithium. J. Organomet. Chem., 5, 580 (1966). D. Seyferth and L. G. Vaughan. 112. The Reduction of gem-Dibromocyclopropanes to Monobromocyclo-propanes with Methylmagnesium Bromide. J. Org. Chem., 31, 1702 (1966). D. Seyferth and B. Prokai. 113. Studies in Phosphinemethylene Chemistry. XIV. The Reaction of Vinylic Phosphonium Bromides with Organolithium Reagents. J. Organomet. Chem., 6, 205 (1966). D. Seyferth and J. Fogel. 114. Studies in Phosphinemethylene Chemistry., XV. The Reaction of Tetraarylphosphonium Bromides with Vinylic Organolithium Reagents. J. Am. Chem. Soc., 88, 2207 (1966). D. Seyferth, J. Fogel, and J. K. Heeren. 115. Halomethyl-Metal Compounds. VI. Phenyl(dihalomethyl)mercury Compounds: Their Preparation and Some Cleavage Reactions. J. Organomet. Chem., 6, 306 (1966). D. Seyferth and H. D. Simmons, Jr.

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116. Halomethyl-Metal Compounds. VII. The Reaction of Phenyl(bromodichloromethyl)mercury with Carboxylic Acids. J. Am. Chem. Soc., 88, 4672 (1966). D. Seyferth and J. Y.-P. Mui. 117. Halogenated Organotin Compounds as CX2 Transfer Agents. J. Organomet. Chem., 6, 573 (1966). D. Seyferth, F. M. Armbrecht, Jr., B. Prokai, and R. J. Cross. 118. Halomethyl-Metal Compounds. IX. The Reaction of Phenyl(bromodichloromethyl)mercury with Alcohols. J. Org. Chem., 31, 4079 (1966). D. Seyferth, V. A. Mai, J. Y.-P. Mui, and K. V. Darragh. 1967 119. Halomethyl-Metal Compounds. VIII. The Reaction of Phenyl(trihalomethyl)mercury Compounds with Hydrogen Chloride. J. Organomet. Chem., 8, 29 (1967). D. Seyferth, J. Y.-P. Mui, L .J. Todd, and K. V. Darragh. 120. Halomethyl-Metal Compounds. X. The Reaction of Organosilicon, Organogermanium and Organotin Hydrides with Phenyl(trihalo-methyl)mercury Compounds. J. Organomet. Chem., 7, 405 (1967). D. Seyferth, J. M. Burlitch, H. Dertouzos, and H. D. Simmons, Jr. 121. Halomethyl-Metal Compounds. XI. The Reaction of Phenyl(trihalomethyl)mercury Compounds with Tertiary Amines. J. Org. Chem., 32, 469 (1967). D. Seyferth, M. E. Gordon, and R. Damrauer. 122. Halomethyl-Metal Compounds. XII. The Action of Sodium Iodide on Phenyl(trihalomethyl)mercury Compounds. A New Method of Dihalocarbene Generation. J. Am. Chem. Soc., 89, 959 (1967). D. Seyferth, M. E. Gordon, J. Y.-P. Mui, and J. M. Burlitch. 123. CX2 Insertion into the Silicon-Mercury and Germanium-Mercury Bonds. J. Organomet. Chem., 7, P20 (1967). D. Seyferth, R. Cross, and B. Prokai. 124. The Preparation and Some Reactions of 1,2-Bis(trimethyltin)benzene and Related Compounds. J. Am. Chem. Soc., 89, 952 (1967). A. B. Evnin and D. Seyferth. 125. Diels-Alder Reactions of Alkynyltin Compounds with Polychlorocyclopentadienes. Organotin-Substituted Polychloronorbornadienes. Cleavage Reactions and Photochemistry. J. Am. Chem. Soc., 89, 1468 (1967). D. Seyferth and A. B. Evnin. 126. Insertion of CCl2 into the Silicon-Carbon Bond of Silacyclobutanes. J. Am. Chem. Soc., 89, 1538 (1967). D. Seyferth, R. Damrauer and S.S. Washburne. 127. A Novel Perhalo-Organolithium Reagent. Inorg. Nucl. Chem. Lett., 3, 181 (1967). D. Seyferth, A. B. Evnin, and D. R. Blank. 12.8 cis-trans-Isomerization of Crotyllithium and Crotyltrimethyltin. J. Organomet. Chem., 9, P13 (1967). D. Seyferth and T. F. Jula. 129. Reactions of Phenyl(bromodichloromethyl)mercury with Alkenylcarboranes.

Seyferth

J. Organomet. Chem., 8, 366 (1967). D. Seyferth and B. Prokai. 130. The Reaction of Phenyl(trihalomethyl)mercurials with Hexamethylditin. The First Case of Dihalocarbene Insertion into a Metal-Metal Bond to Give a Stable MCX2M System. J. Am. Chem. Soc., 89, 2790 (1967). D. Seyferth and F. M. Armbrecht, Jr. 131. Novel Diazoalkanes and the First Carbene Containing the (MeO)2P(O) Group. J. Am. Chem. Soc., 89, 4811 (1967). D. Seyferth, P. Hilbert, and R. S. Marmor. 132. A Novel Isomerization in the Diels-Alder Reaction of R-Pyrone and Bis(trimethylsilyl)acetylene. J. Am. Chem. Soc., 89, 4793 (1967). D. Seyferth, D. R. Blank, and A.B. Evnin. 133. Halomethyl-Metal Compounds. XIII. The Preparation of gem-Difluorocyclopropanes by Iodide Ion Induced CF2 Transfer from Trimethyl(trifluoromethyl)tin. J. Org. Chem., 32, 2980 (1967). D. Seyferth, H. Dertouzos, R. Suzuki, and J.Y.-P. Mui. 134. Halomethyl-Metal Compounds. XIV. The Mechanism of the Phenyl-(bromodichloromethyl)mercury-Olefin Reaction. J. Am. Chem. Soc., 89, 4953 (1967). D. Seyferth, J. Y.-P. Mui, and J. M. Burlitch. 135. Novel Organosilicon- and Organotin-Substituted Polychloromethyllithium Reagents: (CH3)3SiCCl2Li and (CH3)3SnCCl2Li. J. Organomet. Chem., 10, P25 (1967). D. Seyferth, F. M. Armbrecht, Jr., and E. M. Hanson. 136. Disproportionation of a Triorganotin Ester. Z. Naturforsch., 22b, 1358 (1967). D. Seyferth and J. M. Burlitch. 1968 137. A Novel, Mercurial-Based Symmetrical Ketone Synthesis. J. Am. Chem. Soc., 90, 540 (1968). D. Seyferth and R. J. Spohn. 138. Generation of Fluorochlorocarbene by the Mercurial Route J. Organomet. Chem., 11, P9 (1968). D. Seyferth and K.V. Darragh. 139. The Preparation of Group IV Organometallic Compounds Containing gem-Dihalocyclopropyl Groups. J. Organomet. Chem., 11, 63 (1968). D. Seyferth, T. F. Jula, H. Dertouzos, and M. Pereyre. 140. Halomethyl-Metal Compounds. XV. Concerning the Mechanism of the Reaction of Diazomethane with Aryltrichlorogermanes. J. Organomet. Chem., 11, 253 (1968). D. Seyferth and J. Hetflejs. 141. Vinyl Derivatives of Metals. XXIV. Concerning the Addition of Dichloro- and Difluorocarbene via the Trihalomethyl-Metal Route to Vinyl and Allyl Compounds of Carbon, Silicon and Germanium. J. Organomet. Chem., 11, 263 (1968). D. Seyferth and H. Dertouzos. 142. The Nuclear Magnetic Resonance Spectra of Some Arenechromium Tricarbonyl Complexes Containing Trimethyl Group IVb Metal Substituents. Inorg. Chem., 7, 1245 (1968). T. F. Jula and D. Seyferth.

Editorial

143. Trimethylsilyldiazomethane and Trimethylsilylcarbene. J. Am. Chem. Soc., 90, 1080 (1968). D. Seyferth, A. W. Dow, H. Menzel, and T. C. Flood. 144. Polychloronorbornadienyllithium Reagents. J. Organomet. Chem., 13, 25 (1968). D. Seyferth, A. B. Evnin, and D. R. Blank. 145. The Thermal Decomposition of Organometallic Heavy Metal Trihaloacetates in the Presence of Olefins. J. Organomet. Chem., 13, 169 (1968). D. Seyferth, B. Prokai, and R. J. Cross. 146. Bis(trimethylsilyldichloromethyl)mercury, a New and Useful Reagent in Synthetic Organosilicon Chemistry. J. Am. Chem. Soc., 90, 2438 (1968). D. Seyferth and E. M. Hanson. 147. Trimethylmetal Halide Elimination from Trimethylsilylmethyl and Trimethyltinmethyl-Substituted gem-Dihalocyclopropanes. J. Am. Chem. Soc., 90, 2938 (1968). D. Seyferth and T. F. Jula. 148. Halomethylmetal Compounds. XVII. The Mechanism of Dichlorocarbene Insertion into the Si-H Bond by the Mercurial Route. J. Am. Chem. Soc., 90, 2944 (1968). D. Seyferth, R. Damrauer, J. Y.-P. Mui, and T. F. Jula. 149. Halomethyl-Metal Compounds. XVIII. Insertion of Halocarbenes into the Mercury-Halogen Bond. J. Organomet. Chem., 14, 43 (1968). D. Seyferth, M. E. Gordon, and K. V. Darragh. 150. Trimethylhalosilane Elimination from TrimethylsilylSubstituted gem-Dihalocyclopropanes. J. Organomet. Chem., 14, 109 (1968). D. Seyferth and T. F. Jula. 151. Halomethyl-Metal Compounds. XIX. Further Studies of the Aryl(bromodichloromethyl)mercury-Olefin Reaction. J. Am. Chem. Soc., 90, 6182 (1968). D. Seyferth, J. Y.-P. Mui, and R. Damrauer. 1969 152. Halomethyl-Metal Compounds. XX. An Improved Synthesis of Phenyl(trihalomethyl)mercury Compounds. J. Organomet. Chem., 16, 21 (1969). D. Seyferth and R. L. Lambert, Jr. 153. Halomethyl-Metal Compounds. XXI. The Reaction of Phenyl(trihalomethyl)mercury Compounds with Some Phosphorus-Substituted Diazoalkanes. J. Organomet. Chem., 16, 185 (1969). D. Seyferth, J. D. H. Paetsch, and R. S. Marmor. 154. Halomethyl-Metal Compounds. XXII. The Preparation of Trihalomethyl and Other Halogenated Organotin Compounds. J. Organomet. Chem., 16, 249 (1969). D. Seyferth and F. M. Armbrecht, Jr. 155. Ring Expansion of 1,1-Diethyl-1-germacyclobutane via Dichlorocarbene Insertion into the Germanium-Carbon Bond. J. Organomet. Chem., 16, 503 (1969). D. Seyferth, S. S. Washburne, T. F. Jula, P. Mazerolles, and J. Dubac. 156. New Functional Halomethylmercury Compounds and Halocarbenes. J. Am. Chem. Soc., 91, 1562 (1969). D. Seyferth, D. C. Mueller, and R. L. Lambert, Jr.


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157. A Convenient Synthesis of Hydroxymethyldiphenylphospine Oxide and Substituted R-Hydroxybenzyldiphenylphosphine Oxides. J. Org. Chem., 34, 748 (1969). R. S. Marmor and D. Seyferth. 158. Halomethyl-Metal Compounds. XXIII. The Preparation of Bis(triorganotin)dihalomethanes by Dihalocarbene Insertion into the Sn-Sn Bond of Hexaorganoditin Compounds. J. Am. Chem. Soc., 91, 1954 (1969). D. Seyferth, F. M. Armbrecht, Jr., and B. Schneider. 159. New Reactions of Phenyl(bromodichloromethyl)mercury. Preparation of Perchlorothiirane. J. Am. Chem. Soc., 91, 2138 (1969). D. Seyferth and W. Tronich. 160. Halomethyl-Metal Compounds. XXIV. Rearrangements of Mercurial-Derived (Dialkoxymethyl)chlorocarbenes. J. Am. Chem. Soc., 91, 1754 (1969). D. C. Mueller and D. Seyferth. 161. Halomethyl-Metal Compounds. XXV. R-Polyhaloalkyltin Compounds as Halocarbene Precursors. J. Am. Chem. Soc., 91, 2616 (1969). D. Seyferth and F. M. Arbrecht, Jr. 162. The Reaction of Organomercuric Halides with Dicobalt Octacarbonyl. A New Ketone Synthesis. J. Am. Chem. Soc., 91, 3037 (1969). D. Seyferth and R. J. Spohn. 163. Halomethyl-Metal Compounds. XXVI. Concerning the Mechanism of Dichlorocarbene Transfer from Trimethyltin Trichloroacetate to Olefins. J. Am. Chem. Soc., 91, 3218 (1969). F.M. Armbrecht, Jr., W. Tronich, and D. Seyferth. 164. Halomethyl-Metal Compounds. XXVII. The Reaction of Phenyl(dihalomethyl)mercury Compounds with Organosilicon Hydrides: A Preparation of Halomethyl-Silicon Compounds. J. Organomet. Chem., 17, 9 (1969). D. Seyferth, S. B. Andrews, and H. D. Simmons, Jr. 165. Tetramethyl Acetylenediphosphonate and Dimethyl Chloroacetylenephosphonate and Their Reactions with Cyclopentadiene,1,3-Cyclohexadiene and Diazomethane. J. Org. Chem., 34, 1483 (1969). D. Seyferth and J. D. H. Paetsch. 166. Halomethyl-Metal Compounds. XXVIII. Phenyl(dibromochloromethyl)mercury as a Bromochlorocarbene Source. J. Organomet. Chem., 17, 193 (1969). D. Seyferth, S. P. Hopper, and T. F. Jula. 167. Halomethyl-Metal Compounds. XXIX. Reactions of Monohalomethylmercury Compounds with Organosilicon Hydrides: A New Preparation of Methyl Silicon Compounds. J. Organomet. Chem., 17, 367 (1969). D. Seyferth, R. Damrauer, R. M. Turkel, and L. J. Todd. 168. New Reactions of Phenyl(trihalomethyl)mercury Compounds: Preparation of Perhalogenated Oxiranes. J. Organomet. Chem., 18, P8 (1969). D. Seyferth and W. Tronich. 169. A New and Convenient Synthesis of Monohalomethyl Derivatives of Mercury, Tin and Lead. J. Organomet. Chem., 18, P21 (1969). D. Seyferth and S. B. Andrews. 170. Halomethyl-Metal Compounds. XXX. CH2 Transfer to Olefins using Monohalomethylmercury Compounds.

4664


J. Am. Chem. Soc., 91, 5027 (1969). D. Seyferth, R. M. Turkel, M. A. Eisert, and L. J. Todd. 171. A Convenient High Yield Dicobalt Octacarbonyl Catalyzed Synthesis of Diaryl Ketones from Diarylmercury Compounds and Carbon Monoxide. J. Am. Chem. Soc., 91, 6192 (1969). D. Seyferth and R.J. Spohn. 172. Phenyl(trifluoromethyl)mercury: A New and Useful Reagent for the Generation of Difluorocarbene under Mild Conditions. Preparation via a Novel Fluorination Reaction Using Phenylmercuric Fluoride. J. Am. Chem. Soc., 91, 6536 (1969). D. Seyferth, S. P. Hopper, and K. V. Darragh. 1970 173. New Reactions of Phenyl(trihalomethyl)mercurials. C-Perchloroaziridines and Their Thermally Induced Rearrangement. J. Organomet. Chem., 21, P3 (1970). D. Seyferth and W. Tronich. 174. 1,1,3,3-Tetramethyl-1,3-Disilacyclobutane and 1,13,3-Tetramethyl-1-sila-3-germacyclobutane via Active Metal Derivatives of Bis(chloromethyl)-dimethylsilane. J. Organomet. Chem., 21, 103 (1970). D. Seyferth and C. J. Attridge. 175. The Addition of Dihalocarbenes to 1-Germacyclopent-3enes and to 1,1,3,4-Tetramethyl-1-silacyclopent-3-ene. J. Am. Chem. Soc., 92, 657 (1970). D. Seyferth, T. F. Jula, D. C. Mueller, P. Mazerolles, G. Manuel, and F. Thoumas. 176. A Convenient Procedure for the Conversion of Monoorganomercury Compounds, RHgX, to Diorganomercurials. J. Organomet. Chem., 22, 265 (1970). R. C. Wade and D. Seyferth. 177. Halomethyl-Metal Compounds. XXXI. Phenyl(fluorodichloromethyl)mercury. A Useful Source of Fluorochlorocarbene. J. Org. Chem., 35, 1297 (1970). D. Seyferth and K. V. Darragh. 178. Halomethyl-Metal Compounds. XXXII. The Insertion of Phenyl-(bromodichloromethyl)mercury-Derived Dichlorocarbene into Carbon-Hydrogen Bonds, Alkanes and Alkybenzenes. J. Org. Chem., 35, 1989 (1970). D. Seyferth, J. M. Burlitch, K. Yamamoto, S. S. Washburne, and C. J. Attridge. 179. Halomethyl-Metal Compounds. XXXIII. The Insertion of Phenyl(bromodichloromethyl)mercury-Derived Dichlorocarbene into Carbon-Hydrogen Bonds. Ethers. J. Org. Chem., 35, 1993 (1970). D. Seyferth, V. A. Mai, and M. E. Gordon. 180. Co8(CO)24C6, A Bis(tricobalt nonacarbonyl)Dicobalt Hexacarbonyl Derivative of 2,4-Hexadiyne from the Reaction of Dicobalt Octacarbonyl with Hexachlorocyclopropane. J. Organomet. Chem., 23, 237 (1970). D. Seyferth, R. J. Spohn, M. R. Churchill, K. Gold, and F. R. Scholer. 181. Dimethyl Diazomethylphosphonate: Its Preparation and Reactions. Tetrahedron Lett., 2493 (1970). D. Seyferth and R. S. Marmor.

Seyferth

182. The C-Arylation and Alkylation of Methylidynetricobalt Nonacarbonyls by Organomercury Compounds. J. Organomet. Chem., 23, C55 (1970). D. Seyferth, J. E. Hallgren, and R. J. Spohn. 183. Halomethyl-Metal Compounds. XXXIV. The Insertion of Phenyl-(bromodichloromethyl)mercury-Derived Dichlorocarbene into Carbon-Hydrogen Bonds. Tetraalkylsilicon and Tetraalkyltin Compounds. J. Am. Chem. Soc., 92, 4405 (1970). D. Seyferth, S. S. Washburne, C. J. Attridge, and K. Yamamoto. 184. Halomethyl-Metal Compounds. XXXV. The Preparation of Dibromomethyl and Bromochloromethyl Derivatives of Silicon and Germanium by the (Trihalomethyl)mercurial Route and Their Reduction to Monohalomethyl Compounds. J. Organomet. Chem., 23, 99 (1970). D. Seyferth and S. P. Hopper. 185. Halomethyl-Metal Compounds. XXXVI. A Useful Solvent System for the Preparation and Utilization of Polyhaloorganolithium Reagents at Very Low Temperatures. Organometal. Chem. Synth., 1, 3 (1970). D. Seyferth, D. C. Mueller, and F. M. Armbrecht, Jr. 186. Halomethyl-Metal Compounds. XXXVII. The Trimethylsilyl-Substituted Chloromethyllithium Reagents: Me3SiCCl2Li and (Me3Si)2CClLi. J. Organomet. Chem., 23, 361 (1970). D. Seyferth, E. M. Hanson, and F.M. Armbrecht, Jr. 187. Halomethyl-Metal Compounds. XXXVIII. Reactions of Phenyl(trihalomethyl)mercury Compounds with Bis(trimethylsilyl)- and Bis(trimethylgermyl)mercury. J. Organomet. Chem., 24, 33 (1970). D. Seyferth, E. M. Hanson, B. Prokai, and R. J. Cross. 188. Aromatic Electrophilic Substitution Reactions of Phenylmethylidynetricobalt Nonacarbonyl and Diphenylacetylenedicobalt Hexacarbonyl. Preparatively Useful Reactions of Coordinated Organic Ligands. J. Am. Chem. Soc., 92, 5520 (1970). D. Seyferth and A. T. Wehman. 189. Halomethyl-Metal Compounds. XXXIX. Reactions of Phenyl(trihalomethyl)mercury-Derived Dihalocarbenes with Cyclic Allylic Alcohols, Acetates and Methyl Ethers. J. Am. Chem. Soc., 92, 7412 (1970). D. Seyferth and V. A. Mai. 190. Halomethyl-Metal Compounds. XL. TrimethylsilylSubstituted Bromomethyllithium and -Magnesium Reagents. Trimethyltindibromomethylmagnesium Chloride. J. Organomet. Chem., 24, 647 (1970). D. Seyferth, R. L. Lambert, Jr., and E. M. Hanson. 191. Halomethyl-Metal Compounds. XLI. Phenyl(R,Rdichlorobenzyl) mercury: a Phenylchlorocarbene Precursor. J. Organomet. Chem., 25, 293 (1970). D. Seyferth and D. C. Mueller. 1971 192. The Copper-Catalyzed Decomposition of Some Dimethylphosphono-Substituted Diazoalkanes. J. Org. Chem., 36, 128 (1971). R. S. Marmor and D. Seyferth. 193. A New Organosilicon Rearrangement. J. Organomet. Chem., 26, C15 (1971). D. Seyferth and D. L. White. 194. Reactions of Phenyl(bromodichloromethyl)mercury with R-Dicarbonyl Compounds.

Editorial

J. Organomet. Chem., 26, C55 (1971). D. Seyferth and W. E. Smith. 195. An Improved Organomercury Route to Difluorocarbene. J. Organomet. Chem., 26, C62 (1971). D. Seyferth and S. P. Hopper. 196. Halomethyl-Metal Compounds. XLII. Trimethylsilyl-Substituted Halomethylmercury Compounds as Precursors for Trimethylsilyl-Substituted Carbenes. J. Organomet. Chem., 27, 19 (1971). D. Seyferth and E. M. Hanson. 197. Halomethyl-Metal Compounds. XLIII. Dialkoxymethyl- and Trimethylsiloxymethylsubstituted Dichloromethyllithium Reagents. Organometal. Chem. Synth., 1, 127 (1970/1971). DC.Mueller and D. Seyferth. 198. Azidomethyldiphenylphosphine Oxide. Org. Prep. Proced. Int., 3, 51 (1971). D. Seyferth and P. Hilbert. 199. Some Reactions of Dimethylphosphono-Substituted Diazoalkanes: (MeO)2P(O)CR Transfer to Olefins and 1,3Dipolar Additions of (MeO)2P(O)C(N2)R. J. Org. Chem., 36, 1379 (1971). D. Seyferth, R. S. Marmor, and P. Hilbert. 200. Halomethyl-Metal Compounds. XLIV. Reactions of Phenyl(bromodichloromethyl)mercury-Derived Dichlorocarbene with Silacyclobutanes. A Novel Ring Expansion Reaction. J. Am. Chem. Soc., 93, 3709 (1971). D. Seyferth, R. Damrauer, S. B. Andrews, and S. S. Washburne. 201. Halomethyl-Metal Compounds. XLV. Organomercury CF3 CCl Transfer Reagents: PhHgCCl 2 CF3 and PhHgCClBrCF3. J. Am. Chem. Soc., 93, 3714 (1971). D. Seyferth and D. C. Mueller. 202. Halomethyl-Metal Compounds. XLVI. Reaction of Phenyl(bromodichloromethyl)mercury with Heteroatom Cumulenes. J. Org. Chem., 36, 1786 (1971). D. Seyferth, R. Damrauer, H.-M. Shih, W. Tronich, W.E. Smith, and J.Y.-P. Mui. 203. The Methylenation of Methylidynetricobalt Nonacarbonyl with Monohalomethylmercurials. J. Organomet. Chem., 28, C34 (1971). D. Seyferth, R. J. Spohn, and J. E. Hallgren. 204. Halomethyl-Metal Compounds. XLVII. Phenyl(1,1-Dichloroethyl)mercury, a Potential CH3CCl Transfer Agent. J. Organomet. Chem., 28, 325 (1971). D. Seyferth and D. C. Mueller. 205. Bis(trimethylsilyl)diazomethane. J. Organomet. Chem., 29, C25 (1971). D. Seyferth and T. C. Flood. 206. Halomethyl-Metal Compounds. XLVIII. CHCl Transfer to Olefins via Phenyl(dichloromethyl)- and Phenyl(bromochloromethyl)mercury. J. Organomet. Chem., 29, 359 (1971). D. Seyferth, H. D. Simmons, Jr., and H. Shih. 207. Halomethyl-Metal Compounds. XLIX. The Insertion of Phenyl-(bromodichloromethyl)mercury-Derived Dichlorocarbene into Carbon-Hydrogen bonds: Tetraalkylgermanes. Thermolysis of 3-Dichloromethyl-1-metallacycloalkanes. J. Organomet. Chem., 29, 371 (1971). D. Seyferth, H. Shih, P. Mazerolles, M. Lesbre, and M. Joanny.


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208. Halomethyl-Metal Compounds. L. Preparation of Monohalomethyl Derivatives of Germanium, Tin, Lead, and Mercury via Halomethylzinc Halides. J. Organomet. Chem., 30, 151 (1971). D. Seyferth and S. B. Andrews. 209. Phenyl(iododichloromethyl)mercury: A Useful Room Temperature Dichlorocarbene Precursor. J. Organomet. Chem., 30, C38 (1971). D. Seyferth and C. K. Haas. 210. The Stereochemistry of the Insertion of Phenyl(bromodichloromethyl)mercury-Derived Dichlorocarbene into a Benzylic Carbon-Hydrogen Bond. J. Am. Chem., Soc., 93, 4072 (1971). D. Seyferth and Y. M. Cheng. 211. Silicon-, Germanium- and Tin-Substituted Acetylenes and Their Dicobalt Hexacarbonyl Complexes. J. Organomet. Chem., 32, 317 (1971). D. Seyferth and D. L. White. 212. Phenyl(iodobromochloromethyl)mercury and Phenyl(dibromofluoromethyl)mercury: Two New Highly Reactive Divalent Carbon Transfer Agents. J. Organomet. Chem., 33, C1 (1971). D. Seyferth, C. K. Haas, and S. P. Hopper. 213. Matrix-Isolation Study of the Pyrolysis of Bromochloromethyl-Substituted Organomercury Compounds. Infrared Spectra of Bromochlorocarbene and the Free Radicals CCl2Br and CClBr2. J. Phys. Chem., 75, 3984 (1971). A. K. Maltsev, O. M. Nefedov, R. H. Hauge, J. L. Margrave, and D. Seyferth. 1972 214. The Diels-Alder Reaction in Organometallic Chemistry. VI. Diels-Alder Reactions of R-Pyrone with Group IV Element-Substituted Acetylenes. J. Organomet. Chem., 34, 119 (1972). D. Seyferth and D. L. White. 215. New Reactions of Phenyl(trihalomethyl)mercury Compounds. Dihalocarbene Addition to Azodicarboxylate Esters. J. Am. Chem. Soc., 94, 2508 (1972). D. Seyferth and H. Shih. 21.6 The Carbatricobalt Decacarbonyl Cation. A Novel Acylating Agent. J. Am. Chem. Soc., 94, 2547 (1972). J. E. Hallgren, C. S. Eschbach, and D. Seyferth. 217. Halomethyl-Metal Compounds. LI. An Improved Synthesis of R-Iodoalkyl Derivatives of Tin and Mercury by the Organozinc Route. Bis[(trimethylsilyl)iodomethyl]mercury. J. Organomet. Chem., 37, 69 (1972). D. Seyferth, S. B. Andrews, and R. L. Lambert, Jr. 218. Halomethyl-Metal Compounds. LII. The Application of Phenyl-(bromodichloromethyl)mercury, Phenyl(dibromochloromethyl)mercury and Phenyl(tribromomethyl)mercury as Dihalocarbene Sources at Room Temperature. Organometal. Chem. Synth., 1, 415 (1972). D. Seyferth and H. Shih. 219. Acid-Catalyzed Isomerization of 1,2-bis(Trimethylsilyl)benzene and Related Compounds. J. Am. Chem. Soc., 94, 3132 (1972). D. Seyferth and D. L. White. 220. A New Route to C-Carbonyl Derivatives of the Methylidynetricobalt Nonacarbonyl Cluster.

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J. Organomet. Chem., 38, C11 (1972). D. Seyferth and G. H. Williams. 221. Halomethyl-Metal Compounds. LIII. Reactions of Phenyl(trihalomethyl)mercury Compounds with Thiocarbonyl Derivatives. J. Org. Chem., 37, 1537 (1972). D. Seyferth, W. Tronich, R. S. Marmor, and W. E. Smith. 222. Reactions of Dicobalt Octacarbonyl and Related Compounds with gem-Dihalides. J. Org. Chem., 37, 373 (1972). D. Seyferth and M. D. Millar. 223. A Convenient Organomercury CH2 Transfer System. J. Organomet. Chem., 39, C41 (1972). D. Seyferth and C. K. Haas. 224. The Generation of Fluorocarboethoxycarbene by the Organomercury Procedure. J. Fluorine Chem., 2, 214 (1972). D. Seyferth and R. A. Woodruff. 225. Halomethyl-Metal Compounds. LIV. Phenyl(dihalocarbomethoxymethyl)mercury Compounds as Halocarbomethoxycarbene Transfer Agents. J. Organomet. Chem., 43, 55 (1972). D. Seyferth, R. A. Woodruff, D. C. Mueller, and R. L. Lambert, Jr. 226. Crystal Structure of Methyl 5-Bromo-2-oxo-Δ2-3,4oxadiazolin 3-carboxylate. J. Chem. Soc., Chem. Commun., 1036 (1972). D. Seyferth, H. Shih, and M. D. LaPrade. 227. The Diels-Alder Dimerization of 2-Pyrone. J. Org. Chem., 37, 3545 (1972). D. L. White and D. Seyferth. 228. Halomethyl-Metal Compounds. LV. The Synthesis of Phenyl(trifluoromethyl)mercury by Fluorination of Phenyl(tribromomethyl)mercury. J. Organomet. Chem., 44, 97 (1972). D. Seyferth and S. P. Hopper. 229. Organocobalt Cluster Complexes. IX. A New General Route to Alkylidynetricolbalt Nonacarbonyl Complexes. J. Organomet. Chem., 44, C55 (1972). D. Seyferth, P. L. K. Hung, and J. E. Hallgren. 230. Trimethylsilyl-Substituted Diazoalkanes. I. Trimethylsilyldiazomethane. J. Organomet. Chem., 44, 279 (1972). D. Seyferth, H. Menzel, A. W. Dow, and T. C. Flood. 231. Halomethyl-Metal Compounds. LVI. Trimethyltindihalomethyllithium Reagents. J. Organomet. Chem., 44, 299 (1972). D. Seyferth, F. M. Armbrecht, Jr., R. L. Lambert, Jr., and W. Tronich. 232. Halomethyl-Metal Compounds. LVIII. The Insertion of Phenyl-(bromodichloromethyl)mercury-Derived Dichlorocarbene into C-H Bonds. Further Studies of the β-Metal Activated C-H Insertion Reaction. J. Organomet. Chem., 46, 9 (1972). D. Seyferth, Y. M. Cheng, and D. D. Traficante. 233. Cyclohexyl(trihalomethyl)mercury Compounds: Very Reactive Dihalocarbene Precursors. J. Organomet. Chem., 46, C33 (1972). D. Seyferth and C. K. Haas. 234. Halomethyl-Metal Compounds. LVIII. A Convenient Synthesis of Aryl(trifluoromethyl)mercury Compounds. J. Organomet. Chem., 46, 201 (1972). D. Seyferth, S. P. Hopper, and G. J. Murphy.

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235. Halomethyl-Metal Compounds. LX. Phenyl(trifluoromethyl)mercury: a Useful Difluorocarbene Transfer Agent. J. Org. Chem., 37, 4070 (1972). D. Seyferth and S. P. Hopper. 236. Substituted 7-Siladispiro[2.0.2.1]heptanes. The First Stable Silacyclopropanes. J. Am. Chem. Soc., 95, 9246 (1972). R. L. Lambert, Jr., and D. Seyferth. 1973 237. Organocobalt Cluster Complexes. XI. Carbonium Ion Derivatives. J. Am. Chem. Soc., 95, 266 (1973). D. Seyferth, G. H. Williams, and J. E. Hallgren. 238. Organocobalt Cluster Complexes. X. Evidence for the Methylidynetricobalt Nonacarbonyl Radical. J. Organomet. Chem., 49, C41 (1973). D. Seyferth and J. E. Hallgren. 239. Halomethyl-Metal Compounds. LIX. An Improved Preparation of Phenyl(fluorodichloromethyl)mercury, A Useful Fluorochlorocarbene Precursor. J. Organomet. Chem., 49, 117 (1973). D. Seyferth and G. J. Murphy. 240. The Insertion of Phenyl(bromodichloromethyl)mercury-Derived Dichlorocarbene into the Si-C(ring) and β C-H Bonds of the cis and trans Isomers of 1,3-Dimethyl-1-nbutyl-1-silacyclobutane. J. Organomet. Chem., 50, 39 (1973). D. Seyferth, H. Shih, J. Dubac, P. Mazerolles, and B. Serres. 24.1 The Preparation of Functional Alkylidynetricobalt Nonacarbonyl Complexes from Dicobalt Octacarbonyl. J. Organomet. Chem., 50, 265 (1973). D. Seyferth, J. E. Hallgren, and P. L. K. Hung. 242. Halomethyl-Metal Compounds. LXI. Phenyl(fluorodibromomethyl)mercury, A Fluorobromocarbene Precursor. J. Organomet. Chem., 51, 77 (1973). D. Seyferth and S. P. Hopper. 243. Phenyl(1-bromo-1,2,2,2-tetrafluoroethyl)mercury: A Useful Tetrafluoroethylidene Source. J. Organomet. Chem., 52, C1 (1973). D. Seyferth and G. J. Murphy. 244. Halomethyl-Metal Compounds. LXII. Preparation of Diiodomethyl-Metal Compounds. J. Organomet. Chem., 54, 123 (1973). D. Seyferth and R. L. Lambert, Jr. 245. Stereospecific Routes to the Isomeric 7-Bromo-7lithionorcaranes. J. Organomet. Chem., 55, C53 (1973). D. Seyferth and R. L. Lambert, Jr. 246. Concerning the Reactivity of the Silacyclopropane Ring: Comparison with Ring-Opening Reactions of 1,1Dimethyl-1-silacyclobutane. J. Organomet. Chem., 56, C7 (1973). D. Seyferth, C. K. Haas, and D. C. Annarelli. 247. The Mercuration of Phosphonate Esters. J. Organomet. Chem., 59, 231 (1973). D. Seyferth and R. S. Marmor. 248. Halomethyl-Metal Compounds. LXIII. Diethyl Lithiodichloromethylphosphonate and Tetraethyl Lithiochloromethylenediphosphonate. J. Organomet. Chem., 59, 237 (1973). D. Seyferth and R. S. Marmor.

Editorial

249. Halomethyl-Metal Compounds. LXIII. The Insertion of Phenyl-(bromodichloromethyl)mercury-Derived Dichlorocarbene into Benzylic Carbon-Hydrogen Bonds. Stereochemistry and Mechanism. J. Am. Chem. Soc., 95, 6763 (1973). D. Seyferth and Y. M. Cheng. 250. A Carbon-13 NMR Spectroscopic Study of Ferrocenylmethyl Carbonium Ions. J. Organomet. Chem., 60, C53 (1973). G. H. Williams, D. D. Traficante, and D. Seyferth. 251. Halomethyl-Metal Compounds. LXV. Generation of Fluorocarboalkoxycarbenes via the Organomercury Route. J. Org. Chem., 38, 4031 (1973). D. Seyferth and R. A. Woodruff. 252. Synthesis of Heterocyclic Systems via 1,4 Addition Reactions of Phenyl-(bromodichloromethyl)mercury-derived Dichlorocarbene. J. Am. Chem. Soc., 95, 8464 (1973). D. Seyferth and H. Shih. 1974 253. Organocobalt Cluster Complexes. XII. The Arylation and Alkylation of Methylidynetricobalt Nonacarbonyl with Organomercury Compounds. J. Organomet. Chem., 65, 99 (1974). D. Seyferth, J. E. Hallgren, R. J. Spohn, G. H. Williams, M. O. Nestle, and P. L. K. Hung. 254. Organocobalt Cluster Complexes. XIII. Nuclear Magnetic Resonance Spectroscopic Evidence Concerning the Stabilizaton of (Nonacarbonyltricobalt)carbon-Substituted Carbonium Ions. J. Am. Chem. Soc., 96, 604 (1974). D. Seyferth, G. H. Williams, and D. D. Traficante. 255. Halomethyl-Metal Compounds. LXVI. The Preparation of C-Tetrachloroaziridines by the Reaction of Carbonimidoyl Dichlorides with Phenyl(bromodichloromethyl)mercury. Fragmentation of Azo- and Azoxyarenes upon Reaction with Phenyl(bromodichloromethyl)mercury. J. Org. Chem., 39, 158 (1974). D. Seyferth, W. Tronich, and H. Shih. 256. gem-Dichloroallyllithium: A Seemingly Ambident Nucleophile. J. Organomet. Chem., 66, C29 (1974). D. Seyferth, G. J. Murphy, and R. A. Woodruff. 257. The Preparation of Organolithium Reagents by the Transmetalation Reaction. XI. Crotyllithium. J. Organomet. Chem., 66, 195 (1974). D. Seyferth and T. F. Jula. 258. Dihalocarbene Insertion into C-H Bonds of Cycloalkanes. Synthesis, 114 (1974). D. Seyferth and Y. M. Cheng. 259. Organocobalt Cluster Complexes. XV. A New Route to Organofunctional Organocobalt Cluster Complexes Based on the Tricobaltcarbon Decacarbonyl Cation. J. Am. Chem. Soc., 96, 1730 (1974). D. Seyferth, J. E. Hallgren, and C. S. Eschbach. 260. Halomethyl-Metal Compounds. LXVII. The Application of Phenyl(trihalomethyl)mercury Compounds in the Synthesis of Highly Halogenated Oxiranes. J. Organomet. Chem., 67, 341 (1974). D. Seyferth, W. Tronich, W. E. Smith, and S. P. Hopper.


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261. Organocobalt Cluster Complexes. XIV. The Reduction of Formyl and Acylmethylidynetricobalt Nonacarbonyl Complexes to the Respective Alkylidyne- and Hydroxyalkylidynetricobalt Nonacarbonyls by Triethylsilane. J. Organomet. Chem., 71, 97 (1974). D. Seyferth, G. H. Williams, P. L. K. Hung, and J. E. Hallgren. 262. Halomethyl-Metal Compounds. LXIX. Preparation of Some Functional Halomethyl-Mercury Compounds. J. Organomet. Chem., 71, 335 (1974). D. Seyferth and R. A. Woodruff. 263. The Addition of gem-Dichloroallyllithium to Aldehydes and Ketones. Unprecedented Ambident Character of an Allylic Metal Reagent Governed by Substrate Electronic Factors. J. Am. Chem. Soc., 96, 5011 (1974). D. Seyferth, G. J. Murphy, and R. A. Woodruff. 264. The Reaction of Phenyl(trihalomethyl)mercury Compounds with Azodicarboxylate Esters. A New Route to Hydrazonodihalomethanes of Type (RO2C)2NNdCX2. J. Org. Chem., 39, 2329 (1974). D. Seyferth and H. Shih. 265. The Application of Phenyl(trihalomethyl)mercurials in the Preparation of Heterocyclic Compounds. J. Org. Chem., 39, 2336 (1974). D. Seyferth and H. Shih. 266. A New Route to Highly Substituted 1,3-Disila- and Digermacyclobutanes. The First 1,3-Distannacyclobutane. J. Am. Chem. Soc., 96, 6237 (1974). D. Seyferth and J. L. Lefferts. 267. Organocobalt Cluster Complexes. XVI. Vinyl Derivatives of Methylidynetricobalt Nonacarbonyl: Useful Precursors to (OC)9Co3C-Substituted Carbonium Ions and Functionally Substituted Derivatives. J. Organomet. Chem., 78, C13 (1974). D. Seyferth, C. S. Eschbach, G. H. Williams, P. L. K. Hung, and Y. M. Cheng. 268. The Synthesis of Dimethyl(iodomethyl)tin Iodide and 1,1,3,3,5,5-Hexamethyl-1,3,5-Tristannacyclohexane. Synth. React. Inorg. Met.-Org. Chem., 4, 515 (1974). D. Seyferth and S. C. Vick. 1975 269. Halomethyl-Metal Compounds. LXXII. The Preparation of R-Halocyclopropyl Derivatives of Lithium and their Application in the Synthesis of R-Halocyclopropyl Compounds of Silicon, Germanium, Tin, Lead and Mercury. A Novel Isomerization of syn-7-Bromo-anti-7-lithionorcarane to the anti7-Bromo-syn-7-lithio Isomer. J. Organomet. Chem., 88, 255 (1975). D. Seyferth, R. L. Lambert, Jr., and M. Massol. 270. Halomethyl-Metal Compounds. LXXIII. Grignard Reagents Derived from gem-Dibromocyclopropanes. R-Bromocyclopropyltin Compounds as Precursors for R-Bromocyclopropyllithium Reagents by Transmetalation. J. Organomet. Chem., 88, 287 (1975). D. Seyferth and R. L. Lambert, Jr. 271. Halomethyl-Metal Compounds. LXXIV. Organolead Compounds as Precursors for Halocarbenes. J. Organomet. Chem., 90, 173 (1975). D. Seyferth, G. J. Murphy, R. L. Lambert, Jr., and R. E. Mammarella.

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272. Halomethyl-Metal Compounds. 75. Organomercury Reagents for Room Temperature Dihalocarbene Generation. J. Org. Chem., 40, 1620 (1975). D. Seyferth and C. K. Haas. 273. Organocobalt Cluster Complexes. XVII. Friedel-Crafts Acylation of Benzylidynetricobalt Nonacarbonyl Complexes. Further Evidence for the Stabilization of Carbonium Ion Centers by the (OC)9Co3C Moiety. J. Am. Chem. Soc., 97, 2107 (1975). D. Seyferth, G. H. Williams, A. T. Wehman, and M. O. Nestle. 274. Hexamethylsilirane. A Simple, Isolable Silacyclopropane. J. Am. Chem. Soc., 97, 2273 (1975). D. Seyferth and D. C.Annarelli. 275. Halomethyl-Metal Compounds. LXXVI. R-Bromocyclopropyl Derivatives of Tin and Lead as Cyclopropylidene Precursors. J. Organomet. Chem., 91, 31 (1975). D. Seyferth and R. L. Lambert, Jr. 276. Halomethyl-Metal Compounds. LXXVII. An Organomercury Route to Tetrafluoroethylidene. J. Organomet. Chem., 92, 7 (1975). D. Seyferth, G. J. Murphy, and R. A. Woodruff. 277. The Diphenylmethylbis (π-chromium tricarbonyl) Carbonium Ion. Isolation of a Stable Hexafluorophosphate Salt. J. Organomet. Chem., 94, C5 (1975). D. Seyferth and C. S. Eschbach. 278. Organocobalt Cluster Complexes. XIX. Nonacarbonyltricobaltcarbon-Substituted Carbonium Ions. Further 13 C NMR Data and Discussion. J. Organomet. Chem., 97, C11 (1975). D. Seyferth, C. S. Eschbach, and M. O. Nestle. 279. The Generation of Dimethylsilylene under Mild Conditions by the Thermolysis of Hexamethylsilirane. J. Am. Chem. Soc., 97, 7162 (1975). D. Seyferth and D. C. Annarelli. 280. Organocobalt Cluster Complexes. XVIII. FriedelCrafts Acylation of Diarylacetylene-dicobalt Hexacarbonyl Complexes. The Dicobalt Hexacarbonyl Unit as a Protecting Group for the Acetylene Function. J. Am. Chem. Soc., 97, 7417 (1975). D. Seyferth, M. O. Nestle, and A. T. Wehman. 1976 281. Halomethyl-Metal Compounds. LXXVIII. Cyclohexyland β-Phenylethyl(trihalomethyl)mercury Compounds as Dihalocarbene Precursors at Room Temperature. J. Organomet. Chem., 104, 9 (1976). D. Seyferth, C. K. Haas, and D. Dagani. 282. Halomethyl-Metal Compounds. LXXIX. The Generation of Isopropylidene Carbene by the Organomercury Route. J. Organomet. Chem., 104, 145 (1976). D. Seyferth and D. Dagani. 283. A 13C-Nuclear Magnetic Resonance Study of Cyclobutadieneiron Tricarbonyl-Substituted Carbonium Ions. J. Organomet. Chem., 104, 363 (1976). C. S. Eschbach, D. Seyferth, and P. C. Reeves. 284. Molecular Structure and Bonding of a Silacyclopropane, Dimethyldispiro[bicyclo[4.1.0]heptane-7,20 silacyclopropane-30 ,700 -bicyclo[4.1.0]heptane]. J. Am. Chem. Soc., 98, 1779 (1976). G. L. Delker, Y. Wang, G. D. Stucky, R. L. Lambert, Jr., C. K. Haas, and D. Seyferth.

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285. Evidence for the Generation of a Disilacyclopropane in Solution. J. Organomet. Chem., 111, C21 (1976). D. Seyferth and D. P. Duncan. 286. Organocobalt Cluster Complexes. XIX. A New Route to Functionally Substituted Alkylidynetricobalt Nonacarbonyl Complexes via Base-Induced Reactions of Bromomethylidynetricobalt Nonacarbonyl. J. Organomet. Chem., 113, C65 (1976). D. Seyferth and C. L. Nivert. 287. 1,1,3,3-Tetramethyl-2,2,4,4-tetrakis(trimethylsilyl)-1,3disilacyclobutane and Its 1,3-Digerma- and 1,3-Distanna Analogs: Unexpected Products from the Reaction of Bis(trimethylsilyl)bromomethyllithium with Dimethyldihalo Derivatives of Silicon, Germanium and Tin. J. Organomet. Chem., 116, 257 (1976). D. Seyferth and J. L. Lefferts. 288. Dimethylsilylene Transfer from Hexamethylsilirane to Olefins. J. Organomet. Chem., 117, C51 (1976). D. Seyferth and D. C. Annarelli. 289. 1,1-Dimethyl-2,3-bis(trimethylsilyl)-1-silirene, a Stable Silacyclopropene. J. Am. Chem. Soc., 98, 6382 (1976). D. Seyferth, D. C. Annarelli, and S. C. Vick. 290. Organocobalt Cluster Complexes. 20. Novel Chemistry of Acyl- and Aroylmethylidynetricobalt Nonacarbonyl Complexes. Unusual Thermal Ketone Decarbonylation Reactions. J. Am. Chem. Soc., 98, 6724 (1976). D. Seyferth, M. O. Nestle, and C. S. Eschbach. 291. 7,7-Dimethyl-7-siladispiro[2.0.2.1.]heptane Derivatives. The First Silacyclopropanes. J. Organomet. Chem., 122, 311 (1976). D. Seyferth, R. L. Lambert, Jr., and D. C. Annarelli. 1977 292. Novel Two Atom Insertions into the Silacyclopropane and Silacyclopropene Rings. J. Organomet. Chem., 125, C5 (1977). D. Seyferth, D. P. Duncan, and S. C. Vick. 293. The Preparation of a 1,2,-Disilacyclobutane and a 1,2Disilacyclobut-3-ene by Dimethylsilylene Insertion into the Silacyclopropane and Silacyclopropene Ring Systems. New Silacyclopropenes. J. Organomet. Chem., 125, C11 (1977). D. Seyferth and S. C. Vick. 294. Organocobalt Cluster Complexes. 21. Conversion of Halomethylidynetricobalt Nonacarbonyl Complexes to the Tricobaltcarbon Decacarbonyl Cation by the Action of Aluminum Halides. A New and Useful Route to R-Functional Alkylidynetricobalt Nonacarbonyl Complexes. Inorg. Chem. 16, 758 (1977). D. Seyferth, G. H. Williams, and C. L. Nivert. 295. Organocobalt Cluster Complexes. XXII. R,β-Unsaturated Methylidynetricobalt Nonacarbonyl Complexes. J. Organomet. Chem., 134, 67 (1977). D. Seyferth, C. S. Eschbach, G. H. Williams, and P. L. K. Hung. 296. Organocobalt Cluster Complexes. XXIII. Clemmensen and Borane Reductions of Acyl and Vinylic Methylidynetricobalt Nonacarbonyl Complexes. Synth. React. Inorg. Met.-Org. Chem., 7, 269 (1977). D. Seyferth, C. S. Eschbach, and M. O. Nestle.

Editorial

297. A General, High Yield Route to Novel SiliconFunctional Silylmethylidynetricobalt Nonacarbonyl Cluster Complexes. J. Am. Chem. Soc., 99, 5209 (1977). D. Seyferth and C. L. Nivert. 298. Two Atom Insertions into the Silacyclopropane and Silacyclopropene Rings: Mechanistic Considerations. J. Organomet. Chem., 135, C37 (1977). D. Seyferth, S. C. Vick, M. L. Shannon, T. F. O. Lim, and D. P. Duncan. 299. Reactions of gem-Dichloroallyllithium with Aldehydes, Ketones and Other Organic Substrates. An Example of Electronic Control of Regioselectivity in the Reactions of an Ambident Nucleophile. J. Am. Chem. Soc., 99, 5317 (1977). D. Seyferth, G.J. Murphy and B. Mauze . 300. A General Route to Terminally Substituted Allylic Derivatives of Silicon and Tin. Preparation of Allylic Lithium Reagents. J. Org. Chem., 42, 3104 (1977). D. Seyferth, K. R. Wursthorn, and R. E. Mammarella. 301. The Generation of gem-Difluorallyllithium by the Transmetalation Reaction. J. Organomet. Chem., 137, C17 (1977). D. Seyferth and K. R. Wursthorn. 302. An Organolithium Route to Substituted μ4-Cyclobutadienecobalt Complexes. J. Organomet. Chem., 139, 209 (1977). D. Seyferth and S. C. Vick. 303. The Reactions of gem-Dichlorallyllithium with Halides of Silicon, Germanium, Tin and Mercury, and With Triphenylborane. Equilibrium vs Kinetic Control of Regioselectivity. J. Organomet. Chem., 141, 71 (1977). D. Seyferth, G. J. Murphy, and R. A. Woodruff. 304. Synthesis of 1,8-Bis(Trimethylsilyl)- and 1,8-Bis(trimethylstannyl)naphthalene. The Relative Steric Effects of Carbon, Silicon and Tin in the 1,8-Bis(trimethylelement)naphthalenes. J. Organomet. Chem., 141, 173 (1977). D. Seyferth and S. C. Vick. 305. Reactions of Bis(trimethylsilyl)bromomethyllithium and Tris(trimethylsilyl)methyllithium. The Synthesis of R-Bromovinylsilanes. J. Organomet. Chem., 142, 39 (1977). D. Seyferth, J. L. Lefferts, and R. L. Lambert, Jr. 1978 306. The Action of Thiols and Thiolates on Halomethylidynetricobalt Nonacarbonyls: A Multiplicity of Reaction Paths. J. Organomet. Chem., 144, C26 (1978). D. Seyferth, C. N. Rudie, and J. S. Merola. 307. Organolithium Routes to 1,2-Disubstituted Ethylene Derivatives. An Attempted Synthesis of 1,2-Dilithioethylene. J. Organomet. Chem., 144, 1 (1978). D. Seyferth and S. C. Vick. 308. Reactions of 1,1-Dimethyl-2,3-bis(trimethylsily)-1silirene and Hexamethylsilirane with Dimethyl Sulfoxide. Insertion of Dimethylsilanone into the Silirene and Silirane Rings. J. Am. Chem. Soc., 100, 1626 (1978). D. Seyferth, T. F. O. Lim, and D. P. Duncan.


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309. The Extraordinary Reactivity of the Ring Si-C Bonds in 1,1,-Dimethyl-trans-2,3-bis(20 ,20 -dimethylcyclopropylidene)1-silacyclopropane. J. Organomet. Chem., 152, 131 (1978). D. Seyferth, C. K. Haas, R. L. Lambert, Jr., and D. C. Annarelli. 31.0 Reactions of Hexamethylsilirane with Primary and Secondary Phosphines and with Chlorophosphines. J. Organomet. Chem., 153, 299 (1978). W. H€ olderich and D. Seyferth. 311. Metal-Stabilized Carbonium Ions Derived from Bis(tricarbonylchromium) Complexes of Diarylmethanes. J. Am. Chem. Soc., 100, 4124 (1978). D. Seyferth, J. S. Merola, and C. S. Eschbach. 312. gem-Chloro(trimethylsilyl)allyllithium: A Novel Ambident Nucleophile. J. Organomet. Chem., 156, 279 (1978). D. Seyferth and R. E. Mammarella. 313. The Reactions of 3,3-Dichloroallyltrimethylsilane with n-Butyllithium. J. Organomet. Chem., 156, 299 (1978). D. Seyferth and R. E. Mammarella. 314. Hyper-reactive Organosilicon Compounds: Silacyclopropanes and Silacyclopropenes. Science-Ciencia, 5, 144 (1978). D. Seyferth, R. L. Lambert, Jr., D. C. Annarelli, S. C. Vick, T. F. O. Lim, D. P. Duncan, and M. L. Shannon. 315. Reactions of Silacyclopropanes with 1,2-Dipolar Reagents: Diazomethane and Methylenetrimethylphosphorane. J. Organomet. Chem., 159, 137 (1978). D. Seyferth, D. P. Duncan, H. Schmidbaur, and P. Holl. 316. Arsaacetylenes, RCtAs, as Ligands in Dicobalt Hexacarbonyl Complexes: Novel Main Group Element-Transition Metal Hybrid Cluster Compounds. J. Am. Chem. Soc., 100, 6783 (1978). D. Seyferth and J. S. Merola. 317. [η5-Cyclopentadien-1-yl-η4-tetraphenylcyclobutadienecobalt]diphenylmethylium Hexafluorophosphate: A MetalStabilized Carbonium Ion Salt. J. Organomet. Chem., 160, 275 (1978). D. Seyferth and J. S. Merola. 318. Reactions of Hexamethylsilacyclopropane with Carbonyl Compounds in the Presence of Tertiary Phosphines. The Possible Intermediacy of a Dimethylsilylenephosphorane. J. Am. Chem. Soc., 100, 7074 (1978). D. Seyferth and T. F. O. Lim. 319. Phosphaacetylenehexacarbonyldicobalt Complexes: New Cluster Lewis Bases. J. Organomet. Chem., 162, C35 (1978). D. Seyferth and R. S. Henderson. 320. Organocobalt Cluster Complexes. XXVI. Thermolysis of Alkylidynetricobalt Nonacarbonyl Complexes. Evidence of Carbyne Intermediates. J. Organomet. Chem., 162, 89 (1978). D. Seyferth, C. N. Rudie, and J. S. Merola. 321. 1,1-Difluoro-2,2,3,3-tetramethyl-1-silirane: Synthesis and Novel Chemistry. Reinterpretation of Difluorosilylene Reaction Mechanisms. J. Am. Chem. Soc., 100, 7734 (1978). D. Seyferth and D. P. Duncan. 1979 322. Reactions of Siliranes with Elemental Sulfur and with t-Butyl Mercaptan. Preparation of the 2,3-Dithia-1-silacyclopentane Ring System.

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J. Organomet. Chem., 164, 305 (1979). D. Seyferth, D. P. Duncan, and C. K. Haas. 323. Novel Bridging Sulfide Anion Complexes of the Hexacarbonyldiiron Unit: A New Route to Alkylthio Complexes of Iron. J. Am. Chem. Soc., 101, 508 (1979). D. Seyferth and R. S. Henderson. 324. Silylation: A Method for Benzene Solubilization of Benzene-Insoluble, Pyridine-Soluble Coal-Derived Products. Fuel, 58, 74 (1979). D. Seyferth, D. P. Duncan, and H. W. Sternberg. 325. Unusual Lithium Transfer Reactions in LithiumSubstituted Organosilicon Compounds. Reinvestigation of the Reaction of 1,8-Dilithionaphthalene with Trimethylchlorosilane. J. Organomet. Chem., 170, C29 (1979). R.J. Wroczynski, M.W. Baum, D. Kost, K. Mislow, S.C. Vick, and D.Seyferth. 326. The Preparation of Substituted Allyllithium Reagents from Allyltin Compounds by Transmetalation. J. Organomet. Chem., 177, 53 (1979). D. Seyferth and R. E. Mammarella. 327. Organocobalt Cluster Complexes. 28. Highly Stabilized (Nonacarbonyl Tricobaltcarbon)-Substituted Carbonium Ions. J. Am. Chem. Soc., 101, 4867 (1979). D. Seyferth, G. H. Williams, C. S. Eschbach, M. O. Nestle, J. S. Merola, and J. E. Hallgren. 328. Organocobalt Cluster Complexes. XXIX. Novel Silicon Compounds Containing the Nonacarbonyl Tricobaltcarbon Substituent. J. Organomet. Chem., 178, 227 (1979). D. Seyferth, C. N. Rudie, and M. O. Nestle. 329. The Preparation of Allylic Derivatives of Tin by Wittig Reactions of β-Trimethylstannylethylidenetriphenylphosphorane. J. Organomet. Chem., 179, 25 (1979). D. Seyferth, K. R. Wursthorn, and R. E. Mammarella. 330. The Wittig Synthesis of Allylic Organosilicon Compounds. J. Organomet. Chem., 181, 293 (1979). D. Seyferth, K. R. Wursthorn, T. F. O. Lim, and D. J. Sepelak. 331. gem-Difluorallylithium: Preparation by the Transmetalation Procedure and Some Reactions. J. Organomet. Chem., 182, 455 (1979). D. Seyferth and K. R. Wursthorn. 332. Photochemically Induced Insertion of Acetylenes into μ-Dithio-bis(tricarbonyliron). J. Organomet. Chem., 182, C39 (1979). D. Seyferth and R. S. Henderson. 333. Organocobalt Cluster Compounds. 27. The Synthesis of Methylidynetricobalt Nonacarbonyl Complexes Containing Mercapto Substituents. Z. Anorg. Allg. Chem., 458, 267 (1979). D. Seyferth, J. S. Merola, and D. H. Berry. 1980 334. Organocobalt Cluster Complexes. XXX. Carbon Monoxide Ligand Migration During the Solvolysis of Halomethylidynetricobalt Nonacarbonyl Complexes. Useful Syntheses of Carboxymethylidynetricobalt Nonacarbonyl Derivatives.

Seyferth

J. Organomet. Chem., 184, 365 (1980). D. Seyferth and C. N. Rudie. 335. [1]Ferrocenophanes with Phosphorus and Arsenic as the Bridging Atoms: Synthesis and Some Reactions. A New Route to Ferrocenyllithium Reagents. J. Organomet. Chem., 185, C1 (1980). D. Seyferth and H. P. Withers, Jr. 336. The Elusive Germa- and Stannacyclopropanes. Attempted Preparation by the Reaction of 1,3-Dihalides with Magnesium. J. Organomet. Chem., 185, 307 (1980). D. Seyferth, M. Massol, J. Barrau, and S. Monteverdi. 337. The Reaction of the Trimethylchlorosilane/Magnesium Reagent with gem-Dibromocyclopropanes. J. Organomet. Chem., 187, 1 (1980). D. Seyferth and D. P. Duncan. 338. Organocobalt Cluster Complexes. XXXI. The Reaction of Bromo- and Chloromethylidynetricobalt Nonacarbonyl with Thiols and Lithium Thiolates. J. Organomet. Chem., 187, 91 (1980). D. Seyferth, C. N. Rudie, J. S. Merola, and D. H. Berry. 339. A Gas Kinetic Study of the Pyrolysis of Octamethyl1,2-disilacyclobutane. J. Organomet. Chem., 187, 297 (1980). I. M. T. Davidson, N. A. Ostah, D. Seyferth, and D. P. Duncan. 340. Tetramethylcyclopropyllithium: Stability in Diethyl Ether and Reactions with Trimethylchlorosilane and Trimethyltin Chloride. Synth. React. Inorg. Met.-Org. Chem., 10, 137 (1980). D. Seyferth and D. D. Dagani. 341. Organocobalt Cluster Complexes. XXXII. The Preparation of Germyl-Substituted Methylidynetricobalt Nonacarbonyl Complexes. J. Organomet. Chem., 188, 329 (1980). D. Seyferth and H. P. Withers, Jr. 342. 2,4-Pentadienyltrimethylsilane: A Useful Pentadienylation Reagent. J. Org. Chem., 45, 1721 (1980). D. Seyferth and J. Pornet. 343. The Dithiobis(tricarbonyliron) Dianion: Improved Preparation and New Chemistry. J. Organomet. Chem., 192, C1 (1980). D. Seyferth, R. S. Henderson, and L.-C. Song. 344. gem-Difluoroallyllithium: Improved Synthesis Brings Improved Applicability. J. Org. Chem., 45, 2273 (1980). D. Seyferth, R. M. Simon, D. J. Sepelak, and H. A. Klein. 345. (μ-Dithio)bis(tricarbonyliron) as an Organic Disulfide Mimic: Insertion of Low-Valent Metal Species into the Sulfur-Sulfur Bond. J. Organomet. Chem., 193, C75 (1980). D. Seyferth, R. S. Henderson, and M. K. Gallagher. 346. New Functional Allylic Lithium Reagents: gemDialkoxyallyllithium Reagents: A Useful Route to β-Silyl and β-Stannylpropionate Esters. J. Organomet. Chem., 194, 1 (1980). D. Seyferth, R. E. Mammarella, and H. A. Klein. 347. μ3-Alkylidynetris(tricarbonylcobalt) Compounds: Organocobalt Cluster Complexes. Inorg. Syn., XX (1980) 224. D. Seyferth, M. O. Nestle, J. S. Hallgren, J. S. Merola, G. H. Williams, and C. L. Nivert. 348. Hexamethylsilirane: Ring Cleavage by Germanium and Tin Hydrides.

Editorial

J. Organomet. Chem., 198, C51 (1980). D. Seyferth, J. Escudie, M. L. Shannon, and J. Satge. 349. Hexamethylsilirane. I. Preparation, Characterization and Thermal Decomposition. J. Organomet. Chem., 201, 179 (1980). D. Seyferth, D. C. Annarelli, S. C. Vick, and D. P. Duncan. 1981 350. Selenium-Selenium Bond Reactions of μ-(Diselenium)bis(tricarbonyliron). An Inorganic Mimic of Organic Diselenides. J. Organomet. Chem., 204, 333 (1981). D. Seyferth and R. S. Henderson. 351. The Synthesis of 3,3-Difluoroallyl Derivatives of Silicon by an Organosphosphorus Route. J. Organomet. Chem., 205, 301 (1981). D. Seyferth, K. R. Wursthorn, T. F. O. Lim, and D. J. Sepelak. 352. η5-Pentadienyltricarbonylmanganese, an “Open” Analog of Cymantrene. J. Organomet. Chem., 208, 189 (1981). D. Seyferth, E. W. Goldman, and J. Pornet. 353. The Generation of a Highly Reactive Intermediate in the High-Temperature Pyrolysis of Tetramethylsilane. CHEMTECH, 11, 230 (1981). D. Seyferth and J. J. Pudvin. 354. Organocobalt Cluster Complexes. 23. Novel Chemistry of Acyl- and Aroylmethylidynetricobalt Nonacarbonyl Complexes. J. Am. Chem. Soc., 103, 3320 (1981). D. Seyferth and M. O. Nestle. 355. The Reaction of μ-Dithiobis(tricarbonyliron) with Dimanganese Decacarbonyl: A Novel Product and an Interesting Structural Problem. J. Organomet. Chem., 213, C21 (1981). D. Seyferth, R. S. Henderson, J. P. Fackler, Jr., and A. M. Mazany. 356. Novel Boron-to-Sulfur Alkyl Group Transfer in Reactions of Lithium Triethylborohydride-Derived Di(μthiolato)bis(tricarbonyliron) Dianion with Mercuric Chloride and Alkylmercuric Chlorides. J. Am. Chem. Soc., 103, 5103 (1981). D. Seyferth, L.-C. Song and R. S. Henderson. 357. Roussin’s Red Salt, [(μ-S)2Fe2(NO)4]2-: Some Chemistry and an Interesting Comparison with [(μ-S)2Fe2(CO)6]2-. J. Organomet. Chem., 218, C5 (1981). D. Seyferth and M. K. Gallagher. 358. Di-μ-thiolbis(tricarbonyliron), (μ-HS)2Fe2(CO)6: An Inorganic Mimic of Organic Thiols. J. Organomet. Chem., 218, C34 (1981). D. Seyferth and R. S. Henderson. 1982 359. The Chemistry of μ-Dithiobis(tricarbonyliron), an Inorganic Mimic of Organic Disulfides. I. Formation of the Di-μ-thiolato-bis(tricarbonyliron) Dianion. Organometallics, 1, 125 (1982). D. Seyferth, R. S. Henderson, and L.-C. Song. 360. Hexamethylsilirane. II. Ring-Opening Reactions with Some Simple Reagents. J. Organomet. Chem. 225, 177 (1982). D. Seyferth, D. C. Annarelli, M. L. Shannon, J. Escudie, and D. P. Duncan.


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361. Structures of Two (μ-Alkylthio)(μ-alkylmercurithio)bis(tricarbonyliron) Complexes, (μ-RS) (μ-RHgS)Fe2(CO)6 (R = CH3 and C2H5). Organometallics, 1, 473 (1982). C. Chieh, D. Seyferth, and L.-C. Song. 362. Bis(iodomethyl)mercury as a CH2 Transfer Reagent. J. Indian Chem. Soc., 59, 111 (1982). D. Seyferth, C. K. Haas, and D. Dagani. 363. Preparation, Properties and Chemical Reactivity of Phospha- and Arsa-acetylenedicobalt Hexacarbonyl Complexes, (RCE)Co2(CO)6 (E = P, As). Organometallics, 1, 859 (1982). D. Seyferth, J. S. Merola, and R. S. Henderson. 364. Ylid-Komplexe von Alkali-and Erdalkalimetallen. VI. Neutrale and anionsche Ferrocenylmethylide and Fluorenylide. Z. Naturforsch, 37b, 950 (1982). H. Schmidbaur, U. Deschler, and D. Seyferth. 365. An X-ray Photoelectron Spectroscopic Study of the Bonding in (Alkylidyne)tricobalt Nonacarbonyl Complexes and Related Compounds. Organometallics, 1, 699 (1982). S. F. Xiang, A. A. Bakke, H.-W. Chen, C. J. Eyermann, J. L. Hoskins, T. H. Lee, D. Seyferth, H. P. Withers, Jr., and W. L. Jolly. 366. Phosphorus- and Arsenic-Bridged [1]Ferrocenophanes. 1. Synthesis and Characterization. Organometallics, 1, 1275 (1982). D. Seyferth and H. P. Withers, Jr. 367. Phosphorus- and Arsenic-Bridged [1]Ferrocenophanes. 2. Synthesis of Poly((1,10 -ferrocenediyl)phenylphosphine) Oligomers and Polymers. Organometallics, 1, 1283 (1982). H. P. Withers, Jr., D. Seyferth, J. D. Fellman, P. E. Garrou, and S. Martin. 368. Hexamethylsilirane. 3. Dimethylsilylene Transfer Chemistry. Organometallics, 1, 1288 (1982). D. Seyferth, D. C. Annarelli and D. P. Duncan. 369. Preparation and Properties of (μ3-Thio)(μ3-organophosphido)tris(tricarbonyliron)(2Fe-Fe) Complexes. Organometallics, 1, 1294 (1982). D. Seyferth and H. P. Withers, Jr. 370. High-Yield Acyl Anion Trapping Reactions: A Synthesis of Acyltrimethylsilanes. J. Am. Chem. Soc., 104, 5534 (1982). D. Seyferth and R. M. Weinstein. 371. Construction of Bridging Organosulfur Ligands in Hexacarbonyldiiron Complexes via Proximity-Induced Reactions of Di-μ-thiolbis(tricarbonyliron) with R,β-Unsaturated Substrates. J. Am. Chem. Soc., 104, 6839 (1982). D. Seyferth and G. B. Womack. 372. A Useful Dienemethylation Agent: 2,4-Pentadienyltrimethylsilane. Organometallics, 1, 1651 (1982). D. Seyferth, J. Pornet, and R. M. Weinstein. 1983 373. A Novel Liquid Silazane Precursor to Silicon Nitride. J. Am. Ceram. Soc., 66, C-13 (1983). D. Seyferth, G. H. Wiseman, and C. Prud’homme. 374. A Novel Palladium Complex with Iron-Palladium Dative Bonding Derived from 1,2,3-Trithia[3]ferrocenophane: (Ph3P)PdFe(SC5H4)2 3 0.5C6H5CH3.

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Organometallics, 2, 472 (1983). D. Seyferth, B. W. Hames, T. G. Rucker, M. Cowie, and R. S. Dickson. 375. High Yield Acyl Anion Trapping Reactions: Syntheses of R-Hydroxy Ketones and 1,2-Diketones. J. Org.Chem., 48, 1144 (1983). D. Seyferth, R. M. Weinstein, and W.-L. Wang. 376. The Addition of Alkynyllithium Reagents to the S-S Bond of (μ-Dithio)bis(tricarbonyliron): Equilibria Between Open S-Centered and Bridged C-Centered Anions. Organometallics, 2, 776 (1983). D. Seyferth, G .B. Womack and L.-C. Song. 377. Phosphorus- and Arsenic-Bridged [1]Ferrocenophanes. 3. Hydroformylation Catalyzed by the Products of the Interaction of Co2(CO)8 with 1, 10 -Ferrocenylenephenylphosphine Oligomers and Polymers. Organometallics, 2, 818 (1983). J. D. Fellmann, P. E. Garrou, H. P. Withers, Jr., D. Seyferth, and D. D. Traficante. 378. Unexpected Intramolecular Nucleophilic Substitution in an Anionic Fe2(CO)6 Complex with an Organosulfur Ligand. A Novel Preparation of Fe2(CO)6 Complexes of Dithioformic Acid Esters. Organometallics, 2, 928 (1983). D. Seyferth, G. B. Womack, L.-C. Song, M. Cowie, and B. W. Hames. 379. Synthesis of μ,μ0 -(1,10 -Dithiolatoferrocene)hexacarbonyldiiron. Inorg. Chim. Acta, 77, L1 (1983). D. Seyferth and B. W. Hames. 380. gem-Difluoroallylithium: Preparation by LithiumHalogen Exchange and Utilization in Organosilicon and Organic Synthesis. J. Am. Chem. Soc., 105, 4634 (1983). D. Seyferth, R. M. Simon, D. J. Sepelak, and H. A. Klein. 381. Cyclic Polysiloxanes from the Hydrolysis of Dichlorosilane. Inorg. Chem., 22, 2163 (1983). D. Seyferth, C. Prud’homme and G. H. Wiseman. 382. The Structures of Di-μ-methylmercurithio-bis(dinitrosyliron) and Di-μ-methylmercurithio-bis(tricarbonyliron): A Comparison of (μ-CH3HgS)2Fe2(NO)4 and (μ-CH3HgS)2Fe2(CO)6. Inorg. Chim. Acta, 73, 159 (1983). T. C. W. Mak, L. Book, C. Chieh, M. K. Gallagher, L.-C. Song, and D. Seyferth. 383. Synthesis and the Crystal and Molecular Structure of a Platinum-Bridged Derivative of Roussin’s Red Salt, (Ph3P)2Pt(μ3-S)2Fe2(NO)4. Inorg. Chem., 22, 2593 (1983). A. M. Mazany, J. P. Fackler, Jr., M. K. Gallagher, and D. Seyferth. 384. High Yield Acyl Anion Trapping Reactions. The Synthesis of Acyltetrahydrofurans. J. Org. Chem., 48, 3367 (1983). R. M. Weinstein,W.-L. Wang, and D. Seyferth. 385. Alkylidynetricobalt Nonacarbonyl Complexes as Hydroformylation Catalysts. Inorg. Chem., 22, 2931 (1983). H. P. Withers, Jr., and D. Seyferth. 386. 1,1,12,12-Tetra-n-butyl[1.1]stannaferrocenophane: Preparation and Crystal and Molecular Structure. Inorg. Chim. Acta, 75, 139 (1983). A. Clearfield, C. J. Simmons, H. P. Withers, Jr., and D. Seyferth.

Seyferth

387. High Yield Acyl Anion Transfer Reactions. Nucleophilic Acylation of Aldehydes. Tetrahedron Lett., 24, 4907 (1983). D. Seyferth, R. M. Weinstein, W.-L. Wang, and R. C. Hui. 388. Unexpected Rearrangement of the Deprotonation Product of a Thioformic Acid Ester-Hexacarbonyldiiron Complex: Formation of an Exocluster Sulfonium Function. Organometallics, 2, 1696 (1983). D. Seyferth, G. B. Womack, M. Cowie, and B. W. Hames. 1984 389. Hexamethylsilirane. IV. Nucleophilic Ring-Opening by Alkyllithium Reagents. J. Organomet. Chem., 264, 149 (1984). D. Seyferth, G. H. Wiseman, D. C. Annarelli, and M. L. Shannon. 390. The Structure of (μ3-Sulfido)(μ3-p-tolylphosphido)tris(tricarbonyliron) (2Fe-Fe). Inorg. Chim. Acta, 82, 31 (1984). J. P. Fackler, Jr., A. M. Mazany, D. Seyferth, H. P. Withers, Jr., T. G. Wood, and C. F. Campana. 391. High Yield Acyl Anion Trapping Reactions. Nucleophilic Acylation of Dialkyl Disulfides, S-Alkyl Thioesters and Elemental Sulfur. Organometallics, 3, 327 (1984). D. Seyferth and R. C. Hui. 392. Hexamethylsilirane. 5. Conversion to Five-Membered Ring Silicon Compounds by “Two-Atom” Insertion Reactions of Aryl Olefins, 1,3-Dienes and Conjugated Acetylenes. Organometallics, 3, 574 (1984). D. Seyferth, D. P. Duncan, M. L. Shannon, and E. W. Goldman. 393. Hexamethylsilirane. 6. Conversion to 1-Oxa-2-silacyclopentanes by “Two-Atom” Insertion Reactions of Aldehydes and Ketones. Organometallics, 3, 579 (1984). D. Seyferth, D. P. Duncan, and M. L. Shannon. 394. Aroyl Anion Trapping Reactions. A Preliminary Study of Direct Nucleophilic Aroylation by Means of Low Temperature, in situ (CH3)nC6H5-n Li/CO Systems. Tetrahedron Lett., 25, 1651 (1984). D. Seyferth, W.-L. Wang, and R. C. Hui. 395. Reactions of In-Situ Generated Acyllithium Reagents with Carbon Disulfide and Carbonyl Sulfide. Tetrahedron Lett., 25, 2623 (1984). D. Seyferth and R. C. Hui. 396. Intramolecular Nucleophilic Attack at Iron in an Anionic Phosphido-Bridged Fe2(CO)6 Complex. Organometallics, 3, 1121 (1984). D. Seyferth, T. G. Wood, J. P. Fackler, Jr., and A. M. Mazany. 397. Polysilazane Routes to Silicon Nitride. Polym. Prepr., 25, No. 1, 10 (1984). D. Seyferth and G. H. Wiseman. 398. High Yield Synthesis of Si3N4/SiC Ceramic Materials by Pyrolysis of a Novel Polyorganosilazane. J. Am. Ceram. Soc., 67, C-132 (1984). D. Seyferth and G. H. Wiseman. 399. The Chemistry of Octamethyl-1,2-disilacyclobutane. Some Si-Si Cleavage and Insertion Reactions. J. Organomet. Chem., 271, 337 (1984). D. Seyferth, E. W. Goldman, and J. Escudie. 400. Direct Nucleophilic Acylation with Acyllithium Reagents. Acyl Anion Synthons Unmasked.

Editorial

Israel J. Chem., 24, 167 (1984). D. Seyferth, R. M. Weinstein, W.-L. Wang, R. C. Hui, and C. M. Archer. 401. Silacyclopropenes. I. Synthesis and Properties of Some Silacyclopropenes. J. Organomet. Chem., 272, 123 (1984). D. Seyferth, D. C. Annarelli, and S. C. Vick. 402. High Yield Acyl Anion Trapping Reactions: Direct Nucleophilic Acylation of Isocyanates and Isothiocyanates. Tetrahedron Lett., 25, 5251 (1984). D. Seyferth and R. C. Hui. 403. Reactions of Dithio Esters and O-Alkyl Thio Esters with Diiron Nonacarbonyl. Unexpectedly Different Products Formed from RC(S)OR0 and HC(S)OR0 . Organometallics, 3, 1891 (1984). D. Seyferth, G. B. Womack, M. Cowie, and B. W. Hames. 40.4 Silacyclopropenes. 2. “Two-Atom” Insertion Reactions of 1,1-Dimethyl-2, 3-bis(trimethylsilyl)silirene. Organometallics, 3, 1897 (1984). D. Seyferth, S. C. Vick, and M. L. Shannon. 405. 1,1,1,5,5,5-Hexamethyltrisiloxane: Preparation and Some Reactions. J. Organomet. Chem., 277, 203 (1984). D. Seyferth, C. C. Prud’homme, and W.-L. Wang. 406. Linear Polysiloxanes from Dichlorosilane. Inorg. Chem., 23, 4412 (1984). D. Seyferth and C. C. Prud’homme. 1985 407. Silacyclopropenes. 3. Palladium-Catalyzed Insertion Reactions. Organometallics, 4, 57 (1985). D. Seyferth, M. L. Shannon, S. C. Vick, and T. F. O. Lim. 408. A General Route to Novel Iron Carbonyl Complexes Containing Alkanethiolate and Bridging Organic Ligands. Organometallics, 4, 398 (1985). D. Seyferth, G. B. Womack, and J. C. Dewan. 409. Sulfur-Bridged Dimers Obtained from μ-Dithiobis(tricarbonyliron). J. Organomet. Chem., 281, 111 (1985). D. Seyferth, A. M. Kiwan, and E. Sinn. 410. Preparation of S-Bonded Iron Carbonyl Derivatives of Monothiocarboxylic Acids. J. Organomet. Chem., 286, 219 (1985). D. Seyferth and A. M. Kiwan. 411. Preparation of R-Oxo Amidines by the Direct Nucleophilic Acylation of Carbodiimides. J. Org. Chem., 50, 1985 (1985). D. Seyferth and R. C. Hui. 412. Direct Nucleophilic 1,4-Acylation of R,β-Unsaturated Ketones and Aldehydes via Acylcuprate Reagents. J. Am. Chem. Soc., 107, 4551 (1985). D. Seyferth and R. C. Hui. 413. Chemistry of μ-Dithiobis(tricarbonyliron), an Inorganic Mimic of Organic Disulfides. II. Nucleophilic S-S Bond Cleavage by Organolithium and Organomagnesium Reagents. J. Organomet. Chem., 292, 9 (1985). D. Seyferth, R. S. Henderson, L.-C. Song, and G. B. Womack. 1986 414. Preparation of Cyclodisilazanes from Dimethylhydroaminosilanes, (CH3)2Si(H)NHR.


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Organometallics, 5, 146 (1986). G. H. Wiseman, D. R. Wheeler, and D. Seyferth. 415. The Bridging Sulfide Anion Reactivity of Roussin’s Red Salt. Organometallics, 5, 539 (1986). D. Seyferth, M. K. Gallagher, and M. Cowie. 416. A Stable 1:1 Lithium Acylcyanocuprate. Dependence of the Stability of Acylcyanocuprates on the Nature of the Alkyl Substituent. Tetrahedron Lett., 27, 1473 (1986). D. Seyferth and R. C. Hui. 417. A New Synthesis of C-Functional Ferrole Complexes. J. Organomet. Chem., 308, C5 (1986). D. Seyferth, C. M. Archer, and J. C. Dewan. 418. Michael-Type Reactions of Bis(μ-mercapto)bis(tricarbonyliron): Proximity-Induced Formation of Bidentate Organosulfur Ligands. Organometallics, 5, 1568 (1986). D. Seyferth, G. B. Womack, R. S. Henderson, M. Cowie, and B. W. Hames. 419. Construction of Bidentate Organosulfur Ligands via (μ-RCtCS)(μ-LiS)Fe2(CO)6 Intermediates. Organometallics, 5, 2360 (1986). D. Seyferth and G. B. Womack. 420. The Preparation of Silicon-Containing Ceramics via Polymeric Organosilicon Precursors. L’actualit e chimique, 71 (March) 1986. D. Seyferth. 421. Nucleophilic Acylation of Metal Carbonyls: Synthesis and Structure of a Tetracarbonyl(pivaloylacyl)ferrate and its Reaction with Electrophiles. Organometallics, 5, 2570 (1986). K.-H. D€ otz, U. Wenicker, G. M€ uller, H. G. Alt, and D. Seyferth. 422. Novel C-Alkylation of a CO-Bridged Dinuclear Iron Carbonyl Anion: A New Synthesis of Fe2(CO)6 Complexes Containing a Bridging Acyl Ligand. Organometallics, 5, 2572 (1986). D. Seyferth and C. M. Archer. 1987 423. Novel Anionic Rearrangements in Hexacarbonyldiiron Complexes of Chelating Organosulfur Ligands. Organometallics, 6, 283 (1987). D. Seyferth, G. B. Womack, M. K. Gallagher, M. Cowie, B. W. Hames, J. P. Fackler, Jr., and A. M. Mazany. 424. Organosilicon Polymers as Precursors for SiliconContaining Ceramics: Recent Developments. Polym. Prepr., 28, No. 1, 389 (1987). D. Seyferth, G. H. Wiseman, C. A. Poutasse, J. M. Schwark, and Y.-F. Yu. 425. Novel Intramolecular Chemistry Involving Thiolate, Vinyl and Carbonyl Ligands in Reactions of Acetylenes with Li[(μ-RS)(μ-CO)Fe2(CO)6]. Organometallics, 6, 895 (1987). D. Seyferth, J. B. Hoke, and J. C. Dewan. 426. Ligand Rearrangements in Dinuclear Iron Carbonyl Complexes. A Novel Delocalized Bridging Vinylcarbene Complex. Organometallics, 6, 1816 (1987). J. B. Hoke, J. C. Dewan, and D. Seyferth. 427. Michael-Type Addition Reactions of Bis(μ-phenylphosphido)bis(tricarbonyliron) with Olefinic R,β-Unsaturated

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Carbonyl Compounds. Construction of Chelating Bis(phosphido) Ligands. Organometallics, 6, 2563 (1987). D. Seyferth and T. G. Wood. 428. Reactions of Lithium Bis(μ-phenylphosphido)bis(tricarbonyliron), (μ-PhPLi)2Fe2(CO)6, with Organic Halides. A Novel Anionic Rearrangement of a Chelating Diphosphido Ligand. J. Organomet. Chem., 336, 163 (1987). D. Seyferth, T. G. Wood, and R. S. Henderson. 1988 429. Synthesis and Characterization of (μ-R0 CdNPh)(μ-RS)Fe2(CO)6 Complexes. Organometallics, 7, 524 (1988). D. Seyferth and J. B. Hoke. 430. Synthesis and Reactivity of (μ-σ,π-acetylide)(μ-alkaneand μ-arenethiolate)-bis(tricarbonyliron) Complexes. J. Organomet. Chem., 341, 421 (1988). D. Seyferth, J. B. Hoke, and D. R. Wheeler. 431. Phosphido-Bridged Diiron Complexes from LowCoordinate Phosphorus Compounds. Organometallics, 7, 917 (1988). P. Wisian-Neilson, K. D. Onan, and D. Seyferth. 432. Reactions of (μ-PhPLi)2Fe2(CO)6 with Metal Halides. Recl. Trav. Chim. Pays-Bas, 107, 134 (1988). D. Seyferth, R. S. Henderson, and T. G. Wood. 433. Michael-Type Addition Reactions of Bis(μ-phenylphosphido)bis(tricarbonyliron) with Acetylenic R,β-Unsaturated Carbonyl Compounds: Multiple Reaction Pathways. Organometallics, 7, 714 (1988). D. Seyferth and T. G. Wood. 434. High Yield Synthesis of B4C/BN Ceramic Materials by Pyrolysis of Polymeric Lewis Base Adducts of Decaborane(14). J. Am. Ceram. Soc., 71, C-194 (1988). W.S. Rees, Jr., and D. Seyferth. 435. Synthesis of (μ-η2-Vinylidene)(μ-CO)nonacarbonyltriiron Complexes. J. Organomet. Chem., 346, 91 (1988). D. Seyferth, J. B. Hoke, M. Cowie, and A. D. Hunter. 436. Novel Organotransition-Metal Cluster Complexes via Reactions of Dinuclear Metal Carbonyls with (μ-Alkynyl)(μ-alkanethiolato)bis(tricarbonyliron) Complexes. Organometallics, 7, 2163 (1988). D. Seyferth, J. B. Hoke, A. L. Rheingold, M. Cowie, and A. D. Hunter. 437. Preparation of Titanium Nitride and Titanium Carbonitride by the Preceramic Polymer Route. J. Mater. Sci. Lett., 7, 487 (1988). D. Seyferth and G. Mignani. 438. Phosphorus-Containing Derivatives of Decaborane(14) as Precursors to Boron-Containing Materials. Ceram. Eng. Sci. Proc., 9, 1009 (1988). W. S. Rees, Jr., and D. Seyferth. 1989 439. Chemistry of (μ-Dithio)bis(tricarbonyliron), an Inorganic Mimic of Organic Disulfides. 3. Reaction with Low-Valent Metal Compounds and Some Interesting Isolobal Analogies Involving the Products. Organometallics, 8, 119 (1989). M. Cowie, R. L. DeKock, T. R. Wagenmaker, D. Seyferth, R. S. Henderson, and M. K. Gallagher.

Seyferth

440. A Simple Route to Hexacarbonyldiiron Complexes Containing a Bridging Thiolate and an Organic Bridging Ligand by Means of [(μ-RS)(μ-CO)Fe2(CO)6]- Intermediates. Organometallics, 8, 430 (1989). D. Seyferth, G. B. Womack, C. M. Archer, and J. C. Dewan. 441. Reactions of [(μ-CO)(μ-RS)Fe2(CO)6]- Anions with Heterocumulenes and with Elemental Sulfur. Organometallics, 8, 443 (1989). D. Seyferth, G. B. Womack, C. M. Archer, J. P. Fackler, Jr., and D. O. Marler. 442. Preparation of Boron-Containing Ceramic Materials by Pyrolysis of the Decaborane(14)-Derived [B10H12•Ph2POPPh2]x Polymer. Chem. Mater., 1, 45 (1989). D. Seyferth, W. S. Rees, Jr., J. S. Haggerty, and A. Lightfoot. 443. The Unexpected Formation of an Fe2(CO)6 Complex Containing a μ2-Bridging Carbyne Ligand: Structure and Reactivity. Organometallics, 8, 836 (1989). D. Seyferth, D. P. Ruschke, W. M. Davis, M. Cowie, and A. D. Hunter. 444. A Novel Synthesis of Functional, Cyclic (Trimethylenemethane)tricarbonyliron Complexes by the Reactions of R-Substituted Allenyllithium Reagents with Pentacarbonyliron. Organometallics, 8, 1371 (1989). D. Seyferth, L. L. Anderson, and W. M. Davis. 445. Stoichiometric and Catalytic Ring-Opening of Hexaalkylcyclodisilazanes by Organoalkali Reagents. Organometallics, 8, 1980 (1989). D. Seyferth, J. M. Schwark, and R. M. Stewart. 446. Nonpolymeric Binders for Ceramic Powders: Utilization of Neutral and Ionic Species Derived From Decaborane(14). J. Mater. Sci., 24, 4220 (1989). W.S. Rees, Jr., and D. Seyferth. 447. Preparation, Characterization and Pyrolysis of Decaborane(14)-Based Polymers: B4C/BN and BN Precursors. Ceram. Eng. Sci. Proc., 10, 837 (1989). W. S. Rees, Jr., and D. Seyferth. 1990 448. Synthese and Reaktivit€ at von Alkinyl-substituierten Titanocen-Komplexen. Z. Naturforsch., 45b, 212 (1990). H. Lang and D. Seyferth. 449. Borasilazane Polymeric Precursors for Borosilicon Nitride. J. Am. Ceram. Soc., 73, 2131 (1990). D. Seyferth and H. Plenio. 450. Synthesis and Reactivity of 2-Lithio-1,1,3,3-tetramethyl-1,3-disilacyclobutane. Strain-Assisted Ring-Opening Processes. Organometallics, 9, 2677 (1990). D. Seyferth, J. L. Robison, and J. Mercer. 451. Reactions of [Et3NH][(μ-CO)(μ-RS)Fe2(CO)6] Complexes with Acetylenes. Synthesis and Decarbonylation of R,βUnsaturated Bridging Acyl Complexes. Organometallics, 9, 2662 (1990). D. Seyferth, J. B. Hoke, and G. M. Womack. 452. A New Procedure for “Up-Grading” the Nicalon Polycarbosilane and Related Si-H Containing Organosilicon Polymers. New J. Chem., 14, 545 (1990). D. Seyferth, C. A. Sobon, and J. Borm.

Editorial

453. 1,2-Dimethyl-1,2-disila-closo-dodecaborane(12), the First Silicon Analogue of an ortho-Carborane. Angew. Chem., Int. Ed. Engl., 29, 918 (1990); Angew. Chem., 102, 911 (1990). D. Seyferth, K. B€ uchner, W. S. Rees, Jr., and W. M. Davis. 454. Direct Nucleophilic Acylation by the Low Temperature, in situ Generation of Acyllithium Reagents; R-Hydroxy Ketones from Ketones: 3-Hydroxy-2,2,3-trimethyloctan-4one from Pinacolone. Org. Synth., 69 (1990) 114. R. Hui and D. Seyferth. 455. Pyrolysis of Metallocene Complexes, (η-C5H4R)2MR’2: An Organometallic Route to Metal Carbide (MC) Materials (M = Ti, Zr, Hf) Appl. Organomet. Chem., 4 (1990) 599. D. Seyferth and H. Lang. 1991 456. 4-ansa-Metallocene Complexes: Synthesis of 1,1,4,4Tetramethyl-1,4-disilabutylene-Bridged Titanocene, Zirconocene and Hafnocene Derivatives. Organometallics, 10, 347 (1991). D. Seyferth and H. Lang. 457. Preparation of Preceramic Polymers via the Metalation of Poly(dimethylsilene). Organometallics, 10 (1991) 551. D. Seyferth and H. Lang. 458. Reactions of Triethylammonium Salts of the [(μ-CO)(μ-RS)Fe2(CO)6]- Anion with Alkyl-, Aryl-, and Vinylmercuric Halides. Formal C-Alkylation of the Bridging CO Ligand. Organometallics, 10, 3363 (1991). D. Seyferth, C. M. Archer, D. P. Ruschke, M. Cowie, and R. W. Hilts. 459. Structure of the 2-Lithio-1,1,3,3-tetramethyl-1,3-disilacyclobutane-N,N,N0 N0 -Tetramethylethylenediamine Adduct. Organometallics, 10, 3385 (1991). J. L. Robison, W. M. Davis, and D. Seyferth. 460. Characterization of Hydridomethylpolysilazane - A Precursor to SiC/Si3N4 Ceramics. Polym. Prepr., 32, No. 3, 569 (1991). R. M. Stewart, N. R. Dando, D. Seyferth, and A. J. Perrotta. 461. Chemical Modification of Preceramic Polymers: Some Examples from Silicon Chemistry. Polym. Prepr., 32, No. 3, 581 (1991). D. Seyferth, H. Lang, H. J. Tracy, C. Sobon, and J. Borm. 462. Synthesis of R-Diketones by Direct, Low Temperature, in Situ Nucleophilic Acylation of Esters by Acyllithium Reagents. J. Org. Chem., 56, 5768 (1991). D. Seyferth, R. M. Weinstein, R. C. Hui, W.-L. Wang, and C. M. Archer. 463. Reactions of Triiron Dodecacarbonyl with Alkynyl- and Allenyllithium Reagents: Formation of Dinuclear Products. Organometallics, 10, 3759 (1991). D. Seyferth, C. M. Archer, and J. C. Dewan. 464. Preceramic Polymers as “Reagents” in the Preparation of Ceramics. J. Am. Ceram. Soc., 74 [10], 2687 (1991). D. Seyferth, N. Bryson, D.P. Workman, and C.A. Sobon. 465. Preparation, Characterization and Pyrolysis of [B10H12•diamine]n Polymers: A New Route to Boron Nitride.


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Chem. Mater., 3, 1106 (1991). D. Seyferth and W. S. Rees, Jr. 466. Functionalization and Further Cross-linking of the Nicalon Polycarbosilane Based on Its Metalation with the n-Butyllithium-Potassium t-Butoxide Reagent. Appl. Organomet. Chem., 5, 463 (1991). D. Seyferth and H. Lang. 1992 467. Chemical Modification of Preceramic Polymers: Their Reactions with Transition Metal Complexes and Transition Metal Powders. J. Inorg. Organomet. Polym., 2, 59 (1992). D. Seyferth, H. Lang, C. A. Sobon, J. Borm, H. J. Tracy, and N. Bryson. 468. Pyrolysis Chemistry of Poly(organosilazanes) to Silicon Ceramics. Chem. Mater., 4, 705 (1992). H. N. Han, D. A. Lindquist, J. S. Haggerty, and D. Seyferth. 469. Near-Stoichiometric Silicon Carbide from an Economical Polysilane Precursor. J. Am. Ceram. Soc., 75, 1300 (1992). D. Seyferth, T. G. Wood, H. J. Tracy, and J. L. Robison. 470. The Synthesis and Structure of (μ-η2,η3-Pentadienyl)( μ-alkanethiolato)pentacarbonyldiiron (Fe-Fe) Complexes. An Unusual Bonding Mode for the Pentadienyl Group. J. Am. Chem. Soc., 114, 4594 (1992). D. Seyferth, L. L. Anderson, F. Villafa~ ne, and W. M. Davis. 471. Effect of Silicon Exposure on Pyrolysis of Preceramic Polysilazane. Mater. Res. Soc. Symp. Proc., 249, 391 (1992). H. H. Han, D. A. Lindquist, J. S. Haggerty, and D. Seyferth. 472. Novel Silicon Nitride Microstructures Through Processing of phase-Separated Polysilazane Gels. Mater. Res. Soc. Symp. Proc., 249, 565 (1992). D. A. Lindquist, J. S. Haggerty, W. E. Rhine, and D. Seyferth. 473. Synthesis and Reactions of the [(μ-Ph2P)Fe2(CO)6]Anion. Organometallics, 11, 2570 (1992). D. Seyferth, K. S. Brewer, T. G. Wood, M. Cowie, and R. W. Hilts. 474. Synthesis of R-Hydroxy Ketones by Direct, LowTemperature, in Situ Nucleophilic Acylation of Aldehydes and Ketones by Acyllithium Reagents. J. Org. Chem., 57, 5620 (1992). D. Seyferth, R. M. Weinstein, R. C. Hui, W.-L. Wang, and C. M. Archer. 475. Reactions of 2-Furyl, 2-Thienyl, and N-Methyl-2-pyrrolyl Mercurials with [Et3NH][(μ-CO)(μ-RS)Fe2(CO)6] Complexes. Synthesis of Fe2(CO)6 Complexes with Bridging η1:η2Furyl and Thienyl Ligands. Organometallics, 11, 3262 (1992). D. Seyferth, L. L. Anderson, F. Villafa~ ne, M. Cowie, and R. W. Hilts. 476. Reactions of 2-Lithio-1,1,3,3,5,5-hexamethyl-1,3,5trisilacyclohexane with Benzaldehyde, Benzoyl Chloride, and Benzonitrile. Organometallics, 11, 3464 (1992). D. Seyferth and J. L. Robison. 477. Reactions of Thioallenes with Triiron Dodecacarbonyl: A Route to Thioallyl-Bridged Diiron Hexacarbonyl Complexes

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Organometallics, 11, 3736 (1992). D. Seyferth, L. L. Anderson, and W. B. Davis. 1993 478. Cyclopolymerization of Metalloid-Containing R,ωDienes. 1,3-Divinyltetramethyldisiloxane, 1,3-Divinyltetramethyldisilazane, and 1,3-Divinylpentamethyldisilazane. Macromolecules, 26, 407 (1993). D. Seyferth and J. Robison. 479. Some Useful Bis(trimethylsilylamino)silanes. Synth. React. Inorg. Met.-Org. Chem., 23, 113 (1993). G. Mignani and D. Seyferth. 480. New Polymer Pyrolysis Routes to Near-Stoichiometric Silicon Carbide. Polym. Prepr., 34, 223 (1993). D. Seyferth, G. E. Koppetsch, T. G. Wood, H. J. Tracy, J. L. Robison, P. Czubarow, and H.-G. Woo. 481. Mixed (μ-Alkane- and Arenethiolato)(μ-phosphido)hexacarbonyldiiron Complexes. Synthesis and P-Cl Reactivity. J. Organomet. Chem., 446, 167 (1993). D. Seyferth, K. S. Brewer, G. B. Womack, and C. M. Archer. 482. 1,2-Dimethyl-1,2-disila-closo-dodecaborane(12), a Silicon Analog of an o-Carborane: Synthesis; X-ray Crystal Structure; NMR, Vibrational, and Photoelectron Spectra; Bonding. J. Am. Chem. Soc, 115, 3586 (1993). D. Seyferth, K. D. B€ uchner, W. S. Rees, Jr., L. Wesemann, W. M. Davis, S. S. Bukalov, L. A. Leites, H. Bock, and B. Solouki. 483. Direct, Low Temperature, in Situ Nucleophilic Aroylation with Aroyllithium Reagents. J. Org. Chem., 58, 5843 (1993). D. Seyferth, R. C. Hui, and W.-L. Wang. 484. Reactions of [Et3NH][(μ-CO)(μ-RS)Fe2(CO)6] Complexes with Thiazolyl-, Oxazolyl- and Imidazolyl-mercurials: A Route to Fe2(CO)6 Complexes Containing an η1,η2-CdN Bridge. J. Organomet. Chem., 459, 271 (1993). D. Seyferth, L. L. Anderson, and W. M. Davis. 485. Methylhydridopolysilazane and Its Pyrolytic Conversion to Si3N4/SiC Ceramics. Chem. Mater., 5, 1624 (1993). N. R. Dando, A. J. Perrotta, C. Strohmann, R. M. Stewart, and D. Seyferth. 1994 486. Application of Preceramic Polymers in Powder Metallurgy: Their Use as Low-Loss Binders and for the in Situ Formation of Dispersed Ceramic phases in the Metal Matrix. Chem. Mater., 6, 10 (1994). D. Seyferth and P. Czubarow. 487. Triphenylallenyllead: A Facile Preparation and Its Use as a Propargylating Reagent. Organometallics, 13, 2105 (1994). D. Seyferth, D. Y. Son, and S. Shah. 488. Synthesis of an Organosilicon Dendrimer Containing 324 Si-H Bonds. Organometallics, 13, 2682 (1994). D. Seyferth, D. Y. Son, A. L. Rheingold, and R. L. Ostrander. 489. Novel Polymers Containing Carbon-anchored Organotin Groups.

Seyferth

Appl. Organomet. Chem., 8, 335 (1994). D. Seyferth and T. C. Masterman. 490. Novel Products from Reactions of Li[(μ-CO)(μ-RS)Fe2(CO)6] Salts with Ethoxyacetylene. Organometallics, 13, 3452 (1994). D. Seyferth, J. B. Hoke, J. C. Dewan, P. Hofmann, and M. Schnellbach. 491. Investigation of the Microstructure of Poly(diallyldimethylammonium Chloride) by Nitrogen-14 (15) NMR Spectroscopy. J. Polym. Sci., Part B: Polym. Phys., 32 2263 (1994). T. C. Masterman, N. R. Dando, D. G. Weaver, and D. Seyferth. 492. Reactions of Triethylammonium Salts of the [(μ-CO)(μ-RS)Fe 2 (CO)6]- Anions with Alkynylmercury Compounds. Unexpected Products via Hydrogen Migration Processes. Organometallics, 13, 3834 (1994). D. Seyferth, D. P. Ruschke, W. M. Davis, M. Cowie, and A. D. Hunter. 493. Organometallic Chemistry of Ambident Dianions. Reactions of Acetone Dianions as C,O Dinucleophiles with Group 4 Metallocene Dichlorides. Organometallics, 13, 4134 (1994). D. Seyferth, T. Wang, and W. M. Davis. 494. Reactions of (μ2-Carbyne)(μ-RS)Fe2(CO)6 Complexes: Isomerization and Acetylene Insertion. Organometallics, 13, 4695 (1994). D. Seyferth, D. P. Ruschke, and W. M. Davis. 495. Radical-Initiated Hydrosilylation-Cyclization Reactions of bis(Vinyldimethylsilyl) Compounds, CH2dCH(CH3)2SiXSi(CH3)2CHdCH2 (X = O, CH2, NH, NCH3, NSi(CH3)3). Z. Naturforsch., 49b, 1818 (1994) D. Seyferth, H. Friedrich, and S. W. Krska. 1995 496. Poly(vinylsilane), “[CH2CH(SiH3)]n”: Preparation, Characterization, and Utilization as a Preceramic Polymer. Chem. Mater., 7, 236 (1995). D. Seyferth, M. Tasi, and H.-G. Woo. 497. Cyclopolymerization of Diallyldiphenylphosphonium Salts. Polymeric Phosphonium Salts, Phosphine Oxides, and Phosphorus Ylides. Macromolecules, 28, 3055 (1995). D. Seyferth and T. C. Masterman. 498. Organometallic Chemistry of Ambident Dianions. Reactions of Organosilicon Dihalides with Acetone Dianions. Remarkable Difference in Reactivity between Diorganodichlorosilanes and Diorganodifluorosilanes. Organometallics, 14, 2136 (1995). D. Seyferth, T. Wang, R. L. Ostrander, and A. L. Rheingold. 499. The 60Co γ-Radiation-Induced Polymerization of Vinylalkoxysilanes. Organometallics, 14, 2225 (1995). D. Seyferth, D. Y. Son, and M. Tasi. 500. Preparation of Silicon Nitride-Titanium Nitride and Titanium-Titanium Nitride Composites from (CH3)3SiNHTiCl3-Coated Si3N4 and Ti Particles. J. Am. Ceram. Soc., 78 [5], 1247 (1995). C. K. Narula, B. G. Demczyk, P. Czubarow, and D. Seyferth. 501. Tetrakis(perfluoropropyl)tin and Other Perfluoropropyltin Compounds: Synthesis, Characterization and Reactivity.

Editorial

J. Organomet. Chem., 499, 131 (1995). D. Seyferth and F. Richter. 502. Poly(vinylmethylsilane) and Poly(vinyldimethylsilane): Synthesis and Characterization. Reaction of the Latter with Phenylacetylene. Bull. Soc. Chim. France, 132, 489 (1995). D. Seyferth and D. Y. Son. 503. Novel, Convenient, Low Cost Alternative Method for Film Fabrication: Titanium Nitride Thin Films on Alumina Substrates for Automotive Applications from a Molecular Precursor. Chem. Vap. Deposition, 1, 51 (1995). C. K. Narula, P. Czubarow, and D. Seyferth. 504. Silicon Nitride Ceramic Matrix for CMCs from Silane-Derived Powders and Preceramic Polymers. Mater. Res. Soc. Symp. Proc., 365, 101 (1995). W. E. Rhine, A. Lightfoot, D. Seyferth, and J. S. Haggerty. 505. New and Convenient Synthesis of Lithiated Allenes and Ketenimines Based on Readily Available Aryl-Substituted Ketones and Amides. Organometallics, 14, 4457 (1995). D. Seyferth, P. Langer, and M. D€ oring. 506. First Reaction of 1,2-Dimethyl-o-silaborane: Nucleophilic Degradation. Angew. Chem., Int. Ed. Engl., 34, 2236 (1995). L. Wesemann, U. Englert, and D. Seyferth. 507. Preparation of Carbosilane Dendrimers with Peripheral Acetylenedicobalt Hexacarbonyl Substituents. Organometallics, 14, 5362 (1995). D. Seyferth, T. Kugita, A. L. Rheingold, and G. P. A. Yap. 508. Poly(ureidosilazanes): Preceramic Polymeric Precursors for Silicon Carbonitride and Silicon Nitride. Synthesis, Characterization and Pyrolytic Conversion to Si3N4/SiC Ceramics. Chem. Mater., 7, 2058 (1995). D. Seyferth, C. Strohmann, N. R. Dando, and A. J. Perrotta. 1996 509. Polymeric Aluminasilazane Precursors for Aluminosilicon Nitride. J. Mater. Sci. Lett., 15, 348 (1996). D. Seyferth, G. Brodt, and B. Boury. 510. Carbosilane Dendrimers: Molecules with Many Possibilities. Proc. 50th Anniv. Conf. Korean Chem. Soc., Seoul, May 24-25, 1996. D. Seyferth. 1997 511. Application of Poly(methylsilane) and Nicalon Polycarbosilane Precursors as Binders for Metal/Ceramic Powders in Preparation of Functionally graded Materials. J. Mater. Sci., 32, 2121 (1997). P. Czubarow and D. Seyferth. 512. Reactions of the 1,1-Diphenylacetone-Derived Dianion as a C,O-Dinucleophile with Organohalosilanes and -germanes. Organometallics, 16, 2413 (1997). D. Seyferth, T. Wang, P. Langer, R. L. Ostrander, and A. L. Rheingold. 513. Synthesis and Polymerization of Cyclotetrasilazanes. Appl. Organomet. Chem., 11, 813 (1997). D. Seyferth and R. M. Stewart.


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1998 514. Poly(borazinylamine): An Excellent Precursor for the Preparation of Low Volume Fraction Metal-Matrix Composites Containing Metal Borides and Nitrides as Ceramic phase. J. Mater. Sci., 33, 1389 (1998). C. K. Narula, P. Czubarow, and D. Seyferth. 515. Sonochemical Synthesis of a Poly(methylsilane), a Precursor for Near-Stoichiometric SiC. Macromolecules, 31, 229 (1998). P. Czubarow, T. Sugimoto, and D. Seyferth. 516. Synthesis of Water-Soluble Carbosilane Dendrimers. J. Am. Chem. Soc., 120, 3604 (1998). S. W. Krska and D. Seyferth. 517. Domino Reaction of Lithiated Allenes with Nitriles. Chem. Commun., 517, 1927 (1998). P. Langer, M. D€ oring, and D. Seyferth. 1999 518. Preparation of Si/C/Al/N Ceramics by Pyrolysis of Polyaluminasilazanes. Appl. Organomet. Chem., 13, 431 (1999). B. Boury and D. Seyferth. 519. Synthesis of Medium-Sized Rings, Spiro-annulated Oxazacycles and 1-Amino-3-Siloxy Dienes Based on Regioselective Reactions of Ambident Dianions. Synlett, 1, 135 (1999). P. Langer, M. D€ oring, and D. Seyferth. 520. Anionic Cyclopolymerization of Linked Bis(vinylsilyl) Monomers: Substituent Control Over Polymer Structure. Macromolecules, 32, 1 (1999). S. Krska, K. Ueno, and D. Seyferth. 2001 521. Direct Transformation of Silyl Enol Ethers into Functionalized Allenes. Chem. Eur. J., 7, 573 (2001). P. Langer, M. D€ oring, D. Seyferth, and H. G€ orls. 2003 522. Synthesis of Nitrile Oligomers through Multiple Anion Capture Reactions of Allene Dianions. Eur. J. Org. Chem., 10, 1948 (2003). P. Langer, M. D€ oring, D. Seyferth, and H. G€ orls. Review Articles 1. The Chemistry of Silicon Involving Probable Use of d-Type Orbitals. J. Inorg. Nucl. Chem., 1, 112 (1955). F. G. A. Stone and D. Seyferth. 2. The Preparation of Organometallic and Organometalloidal Compounds by the Diazoalkane Method. Chem. Rev., 55, 1155 (1955). D. Seyferth. 3. Organometallic Compounds. Encyclopedia Britannica, Chicago, 1959. G. Calingaert and D. Seyferth. 4. Vinyl Compounds of Metals.“Prog. Inorg. Chem.”, Vol. Three (F. A. Cotton, ed.), Interscience Publishers, New York, 1962, pp 129-280. D. Seyferth.

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5. Metalloorganicheskie Soedinennya s Vinilnoy Gruppoy. Publishing House “Mir”, Moscow, 1964. D. Seyferth. 6. The Chemistry of Halomethyl-Mercury Compounds. Proceedings of the Robert A. Welch Foundation Conferences on Chemical Research. IX. Organometallic Compounds: pp 89-135. Robert A. Welch Foundation, Houston, TX, 1966. D. Seyferth. 7. Steric Effects and π-Bonding in Organosilicon Chemistry: Their Assessment by Means of Comparative Organic Chemistry of Carbon and Silicon. Pure Appl. Chem., 13, 159 (1966). D. Seyferth, G. Singh, and R. Suzuki. 8. Mercury. Annual Survey Covering the Year 1967. Organomet. Chem. Rev. B, 4, 242-266 (1968). D. Seyferth. 9. Mercury. Annual Survey Covering the Year 1968. Organomet. Chem. Rev. B, 5, 288-334 (1969). D. Seyferth. 10. Mercury. Annual Survey Covering the Year 1969. Organomet. Chem. Rev. B, 6, 239-322 (1970). D. Seyferth. 11. Divalent Carbon Insertions into Group IV Hydrides and Halides. Pure Appl. Chem., 23, 391 (1970). D. Seyferth. 12. Organomercurial Carbonylation: The Use of Dicobalt Octacarbonyl as a Stoichiometric and as a Catalytic Reagent. Trans. New York Acad. Sci., Ser. II, 33, 625 (1971). D. Seyferth and R. J. Spohn. 13. The Chemistry of Alkylidynetricobalt Nonacarbonyl and Acetylenedicobalt Hexacarbonyl Complexes. Special Lectures, XXIIIrd International Congress of Pure and Applied Chemistry, Boston, July 1971, Vol. 6, p 133. D. Seyferth, J. E. Hallgren, R. J. Spohn, A. T. Wehman, and G. H. Williams. 14. Beryllium. Annual Survey Covering the Year 1970. Organomet. Chem. Rev. B, 8, 333-339 (1971). D. Seyferth. 1.5 Calcium. Annual Survey Covering the Year 1970. Organomet. Chem. Rev. B, 8, 397-399 (1971). D. Seyferth. 16. Mercury. Annual Survey Covering the Year 1970. Organomet. Chem. Rev. B 8, 425-534 (1971). D. Seyferth. 17. Phenyl(trihalomethyl)mercury Compounds: Exceptionally Versatile Dihalocarbene Precursors. Acc. Chem. Res., 5, 65 (1972). D. Seyferth. 18. Beryllium. Annual Survey Covering the Year 1971. J. Organomet. Chem., 41, 1-7 (1972). D. Seyferth. 19. Calcium, Strontium and Barium. Annual Survey Covering the Year 1971. J. Organomet. Chem. 41, 9-12 (1972). D. Seyferth. 20. Mercury. Annual Survey Covering the Year 1971. J. Organomet. Chem., 41, 155-304 (1972). D. Seyferth. 21. Beryllium. Survey Covering the Year 1972. J. Organomet. Chem., 62, 19-24 (1973). D. Seyferth.

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22. Calcium, Strontium and Barium. Annual Survey Covering the Year 1972. J. Organomet. Chem., 62, 25-32 (1973). D. Seyferth. 23. Mercury. Annual Survey Covering the Year 1972. J. Organomet. Chem., 62, 33-174 (1973). D. Seyferth. 24. Beryllium. Annual Survey Covering the Year 1973. J. Organomet. Chem., 75, 1-4 (1974). D. Seyferth. 25. Calcium, Strontium and Barium. Annual Survey Covering the Year 1973. J. Organomet. Chem., 75, 5-12 (1974). D. Seyferth. 26. Mercury. Annual Survey Covering the Year 1973. J. Organomet. Chem., 75, 13-134 (1974). D. Seyferth. 27. The Elusive Silacyclopropanes - The Preparation and Properties of a Long Sought Class of Organosilicon Compounds. J. Organomet. Chem., 100, 237 (1975). D. Seyferth. 28. Organometallic Compounds as Precursors for Fluorinated Carbenes. Chapter in “Carbenes”, Vol. 2, R .A. Moss, M. Jones, Jr., Eds., Wiley-Interscience, New York, 1975: pp 101-158. D. Seyferth. 29. Beryllium. Annual Survey Covering the Year 1974. J. Organomet. Chem., 98, 117-124 (1975). D. Seyferth. 30. Calcium, Strontium and Barium. Annual Survey Covering the Year 1974. J. Organomet. Chem., 98, 125-132 (1975). D. Seyferth. 31. Mercury. Annual Survey Covering the Year 1974. J. Organomet. Chem., 98, 133-294 (1975). D. Seyferth. 32. Chemistry of Carbon-Functional Alkylidynetricobalt Nonacarbonyl Cluster Complexes. Adv. Organomet. Chem., 14, 97-144 (1976). D. Seyferth. 33. Mercury. Annual Survey Covering the Year 1975. J. Organomet. Chem., 130, 173-301 (1977). D. Seyferth. 34. Mercury. Annual Survey Covering the Year 1976. J. Organomet. Chem., 143, 153-308 (1977). D. Seyferth. 35. Beryllium. Annual Survey Covering the Years 1975 and 1976. J. Organomet. Chem., 143, 129-140 (1977). D. Seyferth. 36. Calcium, Strontium and Barium. Annual Survey Covering the Years 1975 and 1976. J. Organomet. Chem., 143, 141-152 (1977). D. Seyferth. 37. The Potential Utility of Transition Metal-Alkyne Complexes and Derived Cluster Compounds as Reagents in Organic Synthesis. Chapter in “Transition Metal Organometallics in Organic Synthesis”, Vol. II, H. Alper, Ed., Academic Press, New York, 1978, pp 1-63. K. M. Nicholas, M. O. Nestle, and D. Seyferth. 38. Mercury. Annual Survey Covering the Year 1977. J. Organomet. Chem., 176, 137-244 (1979). D. Seyferth.

Editorial

39. Beryllium. Annual Survey Covering the Years 1977 and 1978. J. Organomet. Chem., 180, 1-10 (1979). D. Seyferth. 40. Calcium, Strontium and Barium. Annual Survey Covering the Years 1977 and 1978. J. Organomet. Chem., 180, 11-18 (1979) D. Seyferth. 41. Mercury. Annual Survey Covering the Year 1978. J. Organomet. Chem., 183, 141-263 (1979). D. Seyferth. 42. Mercury. Annual Survey Covering the Year 1979. J. Organomet. Chem., 203, 183-311 (1980). D. Seyferth. 43. Low Temperature Carbonylation of Organolithium Reagents - Acyllithium Compounds as Preparatively Useful Reagents. Nova Acta Leopold., New Ser., 59, No. 264 (1985) 335. D. Seyferth, R. C. Hui, R. M. Weinstein, and W.-L. Wang. 44. Polycarbosilanes: An Overview. Chapter in “Inorganic and Organometallic Polymers” (ACS Symposium Series 360), M. Zeldin, K. J. Wynne, and H. R. Allcock, Eds., American Chemical Society, Washington, DC. 1988, pp 21-42. D. Seyferth. 45. Chemical Modification of Preceramic Polymers: Their Reaction with Transition Metal Complexes and Transition Metal Powders. J. Inorg. Organomet. Polym., 2, 59 (1992). D. Seyferth, H. Lang, C. A. Sobon, J. Borm, H. J. Tracy, and N. Bryson. Studies on the History of Chemistry Essays on the History of Organometallic Chemistry (D. Seyferth) 1. [(C2H4)PtCl3]-, the Anion of Zeise’s Salt, K[(C2H4)PtCl3] 3 H2O. Organometallics, 20, 2 (2001). 2. Cadet’s Fuming Liquid and the Cacodyl Compounds of Bunsen. Organometallics, 20, 1488 (2001). 3. Zinc Alkyls, Edward Frankland, and the Beginnings of Main Group Organometallic Chemistry. Organometallics, 20, 2940 (2001). 4. Dimethyldichlorosilane and the Direct Synthesis of Methylchlorosilanes. The Key to the Silicones Industry. Organometallics, 20, 4978 (2001). 5. Bis(benzene)chromium. 1. Franz Hein at the University of Leipzig and Harold Zeiss and Minoru Tsutsui at Yale. Organometallics, 21, 1520 (2002). 6. Bis(benzene)chromium. 2. Its Discovery by E.O. Fischer and W. Hafner and Subsequent Work by the Research Groups of E.O. Fischer, H.H. Zeiss, F. Hein, C. Elschenbroich, and Others. Organometallics, 21, 2800 (2002). 7. (Cyclobutadiene)iron Tricarbonyl - A Case of Theory Before Experiment. Organometallics, 22, 2 (2003). 8. The Rise and Fall of Tetraethyllead. 1. Discovery and Slow Development in European Universities, 1853-1920. Organometallics, 22, 2346 (2003). 9. The Rise and Fall of Tetraethyllead. 2. Organometallics, 22, 5154 (2003). 10. Uranocene. The First Member of a New Class of Organometallic Derivatives of Uranium. Organometallics, 23, 3562 (2004).


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11. Alkyl and Aryl Derivatives of the Alkali Metals: Useful Synthetic Reagents as Strong Bases and Potent Nucleophiles. 1. Conversion of Organic Halides to OrganoalkaliMetal Compounds. Organometallics, 25, 2 (2006). 12. Alkyl and Aryl Derivatives of the Alkali Metals: Strong Bases and Reactive Nucleophiles. 2. Wilhelm Schlenk’s Organoalkali Metal Chemistry. The Metal Displacement and the Transmetalation Reactions. Metalation of Weakly Acidic Hydrocarbons. Superbases. Organometallics, 28, 2 (2009). 13. The Grignard Reagents. Organometallics 28, 1598 (2009). Book Chapters Describing MIT Research 1. Silicon-Nitrogen Polymers and Ceramics Derived from Reactions of Dichlorosilane, H2SiCl2. in “Emergent Process Methods for High-Technology Ceramics”. R. F. Davis, H. Palmour III, and R. L. Porter, Eds., Plenum Press, New York, Vol. 17, 1984, p 263. D. Seyferth, G. H. Wiseman, and C. C. Prud’homme. 2. Silazane Precursors to Silicon Nitride. in “Ultrastructure Processing of Ceramics, Glasses and Composites”, L. L. Hench and D. R. Ulrich, Eds., Wiley, New York, 1984, p 265. D. Seyferth and G. H. Wiseman. 3. A Novel Polymeric Organosilazane Precursor to Si3N4/ SiC Ceramics. in “Science of Ceramic Chemical Processing”, L. L. Hench and D. R. Ulrich, Eds., Wiley, New York, 1986, Chapter 38, pp 354-362. D. Seyferth and G. H. Wiseman. 4. The Preceramic Polymer Route to Silicon-Containing Ceramics. in “Design of New Materials”, D. L. Cocke and A. Clearfield, Eds., Plenum Press, New York, 1987, pp 79-94. D. Seyferth and Y.-F. Yu. 5. Methyldichlorosilane in the Service of Materials Science. in “Ultrastructure Processing of Advanced Ceramics”, J. D. Mackenzie and D. R. Ulrich, Eds., Wiley, New York, 1988, pp 33-39. D. Seyferth. 6. Organosilicon Polymers as Precursors for SiliconContaining Ceramics. Recent Developments. in “Inorganic and Organometallic Polymers” (ACS Symposium Series 360), M. Zeldin, K.J. Wynne and H.R. Allcock, editors, American Chemical Society, Washington, DC, 1988, pp 143-155. D. Seyferth, G. H. Wiseman, J. M. Schwark, Y.-F. Yu, and C. A. Poutasse. 7. Applications of Methyldichlorosilane in Preparation of Silicon-Containing Ceramics. in “Silicon Chemistry”, J. Y. Corey, E. R. Corey, and P.P. Gaspar, Eds., Ellis Horwood, Chichester, 1988, pp 415-424. D. Seyferth, G. H. Wiseman, Y.-F. Yu, T. S. Targos, C. A. Sobon, T. G. Wood, and G. A. Koppetsch. 8. Organosilicon Polymers as Precursors for Silicon-Containing Ceramics. in“Tranformation of Organometallics Into Common and Exotic Materials: Design and Activation”, (NATO, ASI Series E, Applied Sciences, No. 141), R. M. Laine, editor, Martinus Nijhoff Publishers, Dordrecht, 1988, pp 133-154. D. Seyferth.

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9. The Synthesis of Boron-Containing Ceramics by Pyrolysis of Polymeric Lewis Base Adducts of Decaborane(14). in “Better Ceramics Through Chemistry III”, Materials Research Society Symposium Proceedings, Vol. 121, Materials Research Society, Pittsburgh, 1988, p. 449. D. Seyferth and W. S. Rees, Jr. 10. Synthesis of Some Organosilicon Polymers and Their Pyrolytic Conversion to Ceramics. in “Silicon-Based Polymer Science - A Comprehensive Resource”, Advances in Chemistry Series 224, J. M. Zeigler and F. W. G. Fearon, Eds., American Chemical Society, Washington, DC, 1990, pp 565-591. D. Seyferth. 11. Silicon Ceramics with a Dash of Boron. in “Frontiers of Organosilicon Chemistry”, A. R. Bassindale and P. P. Gaspar, Eds., Royal Society of Chemistry, Cambridge, 1991, pp 15-27. D. Seyferth, H. Plenio, W. S. Rees, Jr., and K. B€ uchner. 12. Birth, Death and Transfiguration: The Synthesis of Preceramic Polymers, Their Pyrolysis and Their Conversion to Ceramics. in “Materials: Today and Tomorrow”, M.-C. H. Lutz, R. Ouliac and J.-P. Pradel, Eds., Societe Rh^ one-Poulenc Recherches, Paris, 1991, pp 29-56. D. Seyferth. 13. Synthesis and Useful Reactions of Organosilicon Polymeric Precursors for Ceramics. in Materials Research Society Symposium Proceedings, Vol. 249, W. E. Rhine, T. M. Shaw, R .J. Gottschall, and Y. Chen, Eds., Materials Research Society, Pittsburgh, 1992, pp 3-14. D. Seyferth, C. Strohmann, H. J. Tracy, and J. L. Robison. 14. Polycarbosilanes as Silicon Carbide Precursors. in “Ultrastructure Processing of Advanced Materials” (Proceedings of the Fourth International Conference on Ultrastructure Processing of Ceramics, Glasses and Composites, February 20-24, 1989, Tucson, AZ), D. R. Uhlmann and D. R. Ulrich, Eds., Wiley, New York, 1992, pp 667-673. D. Seyferth and H. Lang. 15. New Organosilicon Polymers for Ceramics Applications. in Materials Research Society Symposium Proceedings, Vol. 327, A. R. Barron, G. S. Fischman, M. A. Fury, and A. F. Hepp, Eds., Materials Research Society, Pittsburgh, 1994, pp 191-199. D. Seyferth, C. Strohmann, N. R. Dando, A. J. Perrotta, and J. P. Gardner. 16. Preceramic Polymers: Past, Present and Future. in “Materials Chemistry: An Emerging Discipline (Advances in Chemistry Series 245)”, L. V. Interrante, L. A. Casper, and A. B. Ellis, Eds., American Chemical Society: Washington, DC, 1995, pp 131-160. 17. New Applications of Ceramic Precursors - TiN Coating on Alumina and Functionally Gradient Materials. in Materials Research Society Symposium Proceedings, Vol. 410, A. R. Hepp, P. N. Kumta, J. J. Sullivan, G. S. Fischman, A. E. Kaloyeros, Eds., Materials Research Society, Pittsburgh, 1996, pp 149-160. D. Seyferth, C. K. Narula, and P. Czubarow. Books 1. Metalloorganicheskie Soedinennya s Vinilnoy Gruppoy Publishing House “Mir”, Moscow, 1964. D. Seyferth.

Seyferth

2. Annual Surveys of Organometallic Chemistry. Vol. 1, covering 1964. Elsevier Publishing Company, Amsterdam, 1965. D. Seyferth and R. B. King. 3. Annual Surveys of Organometallic Chemistry, Vol. 2. covering 1965. Elsevier Publishing Company, Amsterdam, 1966. D. Seyferth and R. B. King. (Eds.) 4. Annual Surveys of Organometallic Chemistry, Vol. 3, covering 1966. Elsevier Publishing Company, Amsterdam, 1967. D. Seyferth and R. B. King. (Eds.) 5. New Applications of Organometallic Reagents in Organic Synthesis. Elsevier Scientific Publishing Company, Amsterdam, 1976. D. Seyferth. (Ed.) Patents 1. Process for Producing [Cyclopentadienyl] Organometallic Compounds. Austral. Patent 211,085 (Oct. 24, 1957). D. Seyferth and J. M. Birmingham. 2. Organosilicon Boranes. U.S. Patent 2,831,009 (April 15, 1968) - to Dow Corning Corp.; cf. Chem. Abstr., 52, 14653 (1958). 3. 1,10 -Bis(trialkylsilyl)ferrocenes. Brit. Patent 799,067 (July 30, 1958) - to Midland Silicones Ltd.; cf. Chem. Abstr., 53, 15094 (1959). 4. Organosilicon Polyboranes. U.S. Patent 2,902,505 (Sept. 1, 1959) - to Dow Corning Corp.; cf. Chem. Abstr., 54, 5466 (1960). 5. Organosilylalkyl Derivatives of Phosphorus, Arsenic, Antimony and Bismuth. U.S. Patent, 2,964,550 (Dec. 13, 1960) - to Metal & Thermit Corp.; cf. Chem. Abstr., 57, 6131 (1962). 6. Stabilizing Organic Polysiloxanes. German Patent 1,116,396 (Cl. 39b) (Nov. 2, 1961) - to Dow Corning A.G.; cf. Chem. Abstr., 57, 6131 (1962). 7. Vinyl Alkali Metal Compounds. Brit. Patent 876,008 (1961) - to Ethyl Corp.; cf. Chem. Abstr., 56, 10188 (1962). 8. Preparation of Vinyl Metal Compounds. U.S. Patent 3,085,119 (April 9, 1963) - to Ethyl Corporation. D. Seyferth and M. A. Weiner. 9. Preparation of Allylic Metal Compounds. U.S. Patent 3,085,120 (April 9, 1963) - to Ethyl Corporation; cf. Chem. Abstr., 59, 10119 (1963). D. Seyferth and M. A. Weiner. 10. Novel Organotin Compounds. U.S. Patent 3,070,615 (Dec. 25, 1962); cf. Chem. Abstr., 58, 11399 (1963). 11. Production of Dihalocarbene Adducts. U.S. Patent 3,265,745 (Aug. 9, 1966) - to Ethyl Corporation; cf. Chem. Abstr., 65, 13577 (1966). D. Seyferth and J. M. Burlitch. 12. Cyclopropyltin Compounds. U.S. Patent 3,347,888 (Oct. 17, 1967) - to Dow Chemical Co.; cf. Chem. Abstr., 68, 5780 (1968). 13. Metalated Phosphines as Intermediates for Insecticides and Microbiocides. U.S. Patent 3,426,021 (Feb. 4, 1969) - to Dow Chemical Co.; cf. Chem. Abstr., 71, 3916a (1969). 14. Process for Preparing Phenyl(trihalomethyl)mercury Compounds.

Editorial

U.S. Patent 3,658,861 (April 25, 1972) - to M.I.T.; cf. Chem. Abstr., 77, 19807e (1972). D. Seyferth and R. L. Lambert, Jr. 15. Photosynthesis of Ketones from Organomercury Compounds and Carbon Monoxide. U.S. Patent 3,692,652 (Sept. 19, 1972) - to M.I.T. D. Seyferth and R. J. Spohn. 16. Method for Making Organo(fluoromethyl)mercury Compounds. U.S. Patent 3,694,477 (Sept. 26, 1972) - to M.I.T. D. Seyferth, S. P. Hopper, and K. V. Darragh. 17. Reaction of Phenyl(bromodichloromethyl)mercury and the Preparation of Perchlorothiirane. U.S. Patent 3,717,660 (Feb. 20, 1973) - to M.I.T. D. Seyferth and W. Tronich. 18. Prevention of Discoloration in Vinylidene Chloride. U.S. Patent 3,751,495 (Aug. 7, 1973) - to PPG Industries, Inc. 19. Route to Organo(trifluoromethyl)mercury Compounds. U.S. Patent 3,763,203 (Oct. 2, 1973) - to M.I.T. D. Seyferth and S. P. Hopper. 20. Process for Forming Difluorocarbene and 1,1-Difluorocyclopropanes. U.S. Patent 3,803,251 (April 9, 1974) - to M.I.T. D. Seyferth and S. P. Hopper. 21. Silacyclopropanes and Method. U.S. Patent 3,899,523 (August 12, 1975) - to M.I.T. D. Seyferth and R. L. Lambert, Jr. 22. Stable Liquid Polymeric Precursor to Silicon Nitride and Process. U.S. Patent 4,397,828 (August 9, 1983) - to M.I.T. D. Seyferth, C. C. Prud’homme, and G. H. Wiseman. 23. Preceramic Organosilazane Polymers. U.S. Patent 4,482,669 (November 13, 1984) - to M.I.T. D. Seyferth and G. H. Wiseman. 24. Method for Forming New Preceramic Polymers for SiC and Si3N4/SiC Systems. U.S. Patent 4,645,807 (February 24, 1987) - to M.I.T. D. Seyferth, T. G. Wood, and Y.-F. Yu. 25. Method for Forming New Preceramic Polymers Containing Silicon. U.S. Patent 4,639,501 (January 27, 1987). D. Seyferth and Y.-F. Yu. 26. Method for Converting Si-H Containing Polycarbosilanes to New and Useful Preceramic Polymers and Ceramic Materials. U.S. Patent 4,650,837 (March 17, 1987). D. Seyferth and Y.-F. Yu. 27. Method for Converting Si-H Containing Polysiloxanes to New and Useful Preceramic Polymers and Ceramic Materials. U.S. Patent 4,705,837 (November 10, 1987). D. Seyferth, Y.-F. Yu, and T. S. Targos. 28. Method for Forming New Preceramic Polymers Containing Silicon. U.S. Patent 4,719,273 (January 12, 1988). D. Seyferth, Y.-F. Yu, and G. E. Koppetsch. 29. Organopolysilazane Precursors to Silicon Nitride-Rich Mixed SiC/Si3N4. U.S. Patent 4,720,532 (January 19, 1988). D. Seyferth and J. M. Schwark. 30. Method for Converting Organosilicon Polymers Containing SiH Repeat Units and Organopolysilazane


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Precursors to New and Useful Preceramic Polymers and Silicon Nitride-Enriched Ceramic Materials. U.S. Patent 4,767,876 (August 30, 1988). D. Seyferth, J. M. Schwark, and Y.-F. Yu. 31. Hybrid Polymers Derived from Si-H Containing Organosilicon Polymers and Unsaturated Metal Alkoxides. U.S. Patent 4,780,337 (October 25, 1988). D. Seyferth and T. S. Targos. 32. Method for Forming New Preceramic Polymers for SiC and Si3N4/SiC. U.S. Patent 4,820, 783 (April 11, 1989). D. Seyferth, T. G. Wood, and Y.-F. Yu. 33. Lewis Base Adducts of Decaborane for Forming New Preceramic Polymers, Using as Binders, Forming Shaped Bodies and Forming Fibers. U.S. Patent 4,871,826 (October 3, 1989). D. Seyferth and W. S. Rees, Jr. 34. Lewis Base Adducts of Decaborane for Forming New Preceramic Polymers, Using as Binders, Forming Shaped Bodies and Forming Fibers. U.S. Patent 5,026,809 (June 25, 1991). D. Seyferth and W. S. Rees, Jr. 35. Preceramic Organosilicon-Metal Carbonyl Polymers. U.S. Patent 5,070,116 (December 3, 1991). D. Seyferth, C. A. Sobon, and J. Borm. 36. Preceramic Organosilicon-Boron Polymers. U.S. Patent 5,171,736 (December 15, 1992). D. Seyferth and H. Plenio. 37. Preparation of Silicon Carbide Ceramics from the Modification of an Si-H Containing Polysilane. U.S. Patent 5,204,380 (April 20, 1993). D. Seyferth, H. J. Tracy, and J. L. Robison. 38. Ceramic Synthesis by Pyrolysis of Metal-Containing Polymer and Metal. U.S. Patent 5,332,701 (July 26, 1994). N. Bryson, D. Seyferth, H. J. Tracy, and D. P. Workman. 39. Preceramic Polymers as Binders for Metal/Ceramic Powders in Preparation of Functionally Gradient Materials. U.S. Patent 5,455,000 (October 3, 1995). D. Seyferth and P. Czubarow. 40. Process for Forming a Bromomagnesium Tetrakis(fluorophenyl) Borate. U.S. Patent 5,473,036 (December 5, 1995) - to Akzo Nobel N.V.. A. M. Piotrowski, D. F. Taylor, and D. Seyferth. 41. Group 4 Metal-Containing Organosilicon Dendrimers and Method for Synthesizing Organosilicon Dendrimers. U.S. Patent 5,969,073 (October 19, 1999). D. Seyferth and R. Wyrwa. 42. Sonichemical Synthesis of Silicon Carbide Precursors and Methods for Preparation Thereof. U.S. Patent 6,020,417 (February 1, 2000). D. Seyferth, T. Sugimoto, and P. Czubarow. 43. Olefin Polymerization with Group 4 Metal-Containing Organosilicon Dendrimers. U.S. Patent 6,313,239 B1 (November 6, 2001) - to Bayer Corp.; Bayer A.G.; MIT. D. Seyferth, R. Wyrwa, U. W. Franz, and S. Becke.

Dietmar Seyferth Editor Emeritus

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