Final Program - C&EN Global Enterprise (ACS Publications)

Final Program XXXIIIrd International Congress of Pure and Applied Chemistry

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The International Union of Pure and Applied Chemistry (IUPAC) will hold its XXIIIrd International Congress in Boston, Mass., U.S.A. from Sunday, July 25, 1971, through Friday, July 30, 1971. The scientific p r o g r a m will represent the interests of two divisions of IUPAC: Macromolecular Chemistry and Organic Chemistry. On behalf of IUPAC, the National Academy of Sciences-National Research Council of the United States of America extends a cordial invitation to attend this congress. Details of the pro­ gram and meeting arrangements will be found on the following pages. IUPAC, founded in 1920, is a voluntary

nonprofit association of organizations each representing the chemists of a m e m b e r nation, of which there are now 43. Its objectives are to p r o m o t e con­ tinuing cooperation among the chemists of the member nations, to consider issues of international importance to p u r e and applied chemistry that need regulation or standardization, and in general to ad­ vance chemistry in all its aspects. The National Academy of Sciences-National Research Council is the national adhering organization for the U.S.A. and main­ tains close liaison with the activities of IUPAC through its U.S. National Com­ mittee for IUPAC.

REGISTRATION This form should be filled out and returned to the Secretariat: XXIIIrd Congress of Pure and Applied Chemistry, A. T. Winstead, Director, c/o American Chemical Society, 1155 Sixteenth Street, N.W., Washington, D.C. 20036, U.S.A. D Dr. D Prof. D Mr.

D Mrs. D Miss

Name: University or Organization: Mailing Address:

City:

Country:

I shall be accompanied by the following associate member(s): Name(s):

Mrs./Miss/Mr.:

Check Days at Congress

Su D

Mo D

Tu, D

We D

Th D

Fr D

To determine applicable registration fee, check appropriate classification below: Status (check one)

• Member $50 (US)

Registration Fee

D Undergraduate or Graduate Student $20 (US)

D Associate Members—Guests of Registrants $20 (US) IMPORTANT: .1. Mail completed form with check payable to ACS-IUPAC. 2. Deadline for receipt of Form, July 1, 1971.

58

C&EN JUNE 7, 1971

GENERAL INFORMATION REGISTRATION Chemists and other scientists who are interested in the program of the X X I I I r d International Congress of Pure and Ap­ plied Chemistry will be accepted as Members of this congress u p o n registra­ tion and payment of fee. The registration fee for membership is $50 and should be paid in U.S. dollars to the ACS-IUPAC. Undergraduate and graduate students may register as Mem­ bers with a fee of $20. Members of families who wish to take p a r t in only the scheduled social events can register as Associate Members. The fee is $20. Advance registrants will receive an acknowledgment sent to the mailing ad­ dress given on the registration form. Upon arrival at the congress, registered Members should claim their registra­ tion materials (abstracts, badges, pro­ grams, tickets, etc.) at the congress registration area, located in the Constitu­ tion Room foyer (2nd floor) of the Shera­ ton-Boston Hotel. The registration area will be open from 3 to 8 P.M. on Sunday, July 25, and from 8 A.M. to 6 P.M., Mon­ day through Thursday. For the con­ venience of Members who arrive in Boston earlier, the secretariat will be open commencing at 9 A.M. Friday, July 23 in the Constitution Room (2nd floor) at the Sheraton-Boston Hotel. The capacity of meeting rooms and other facilities is limited to an attendance or about 6000. Registrations will be ac­ cepted in the order received. An early registration is suggested in order to avoid disappointment. Registration at the time of the congress will be possible only if capacity has not been reached. The advance registration fee will be refunded in full to those who m u s t cancel their attendance at the congress if the request for refund is m a d e prior to July 1, 1971. HOUSING ACCOMMODATIONS Hotel rooms have been reserved by the secretariat at hotels and motels in Boston and its nearby suburbs. In addition, dormitory accommodations will be avail­ able at universities in Boston and Cam­ bridge. There is excellent rapid-transit service in Boston and from Cambridge to downtown Boston. Bus and taxi service also are good. Those desiring accommodations should complete the application form for ac­ commodation (Form B) and r e t u r n it as soon as possible. Every effort will be

m a d e to provide the type of accommodation requested, b u t early response is advisable. Confirmation of reservations will be sent to the mailing address indicated on the form, unless the registrant specifically requests otherwise. CURRENCY Decimal currency is in use in the United States (dollars and cents 1 ). The conversion rate between U.S. dollars and other currencies fluctuates. All congress transactions will be in U.S. currency. Exchange facilities will be available in the congress registration area at the Sheraton-Boston Hotel. CLIMATE AND DRESS Boston weather in the latter p a r t of July is generally warm; the average high t e m p e r a t u r e is 82° F (28 °C) and the average low is 65° F (18°C). Most hotels are air-conditioned, b u t not necessarily the university dormitories. A raincoat a n d / o r umbrella is advisable. No officially scheduled congress event will require formal dress. EXPOSITION Exhibits of new chemicals, instruments, products, publications, and services will b e on display from Tuesday, July 27 through Thursday, July 29 in the Exhibition Area (2nd floor) of the John B. Hynes Civic Auditorium. Special seminars will be conducted by exhibitors. These presentations will provide more detailed explanations and demonstrations of new techniques than normally are possible on the floor of the exposition. The schedule will be p a r t of the final program. HOSPITALITY A reception will be held for all Members and Associate Members in the Grand Ballroom of the Sheraton-Boston Hotel between 5 and 8 P.M. on Sunday, July 25. The opening ceremony will be held in the John B. Hynes Civic Auditorium beginning at 10 A.M. on Monday, July 26. It will feature welcoming addresses by government officials and keynote addresses by representative leaders of academic and industrial chemistry. Members and Associate Members are invited to attend. Dinners at the homes of residents of the Boston area are planned for congress participants from abroad on Tuesday evening, July 27. These dinners are being coordinated by the Northeastern Section of the American Chemical Society. On Wednesday evening, July 28, a special concert by the Boston Symphony Orchestra will be held in Symphony Hall, beginning at 8:00 P.M. For the convenience of early arrivals, the office of the secretariat will be open Friday, July 23 and Saturday, July 24, from 9 A.M. to 5 P.M. at the SheratonBoston Hotel, Constitution Room (2nd floor).

Institute of Contemporary Art, the Museum of Science, Hayden Planetarium, and n u m e r o u s others. Nearby a r e t h e Public Garden and Beacon Hill, one of Boston's m o s t picturesque residential areas. To the west flows the Charles River, on whose opposite banks stands Cambridge, an international center of scholarship, cultural pursuits and scientific research; home of Harvard, Radcliffe, and Massachusetts Institute of Technology; a fascinating town of international shops, restaurants, and pubs; the home of great poets, the locale of m u c h history. A visit to the N o r t h Shore takes one by

life dramatic episodes in t h e b i r t h of America as a nation. Faneuil Hall, Old N o r t h Church, the Old South Meeting House, Old Ironsides, are just a few of the many sites which ring with history and dramatize the intrinsic c h a r m of Old Boston. A block or two to the East is Boston H a r b o r where one can b o a r d a boat and witness the whole p a n o r a m a of the city, as well as visit the m a n y outer islands, each with its traditions, each with a story to tell. Not far from t h e Sheraton-Boston Hotel, a world of culture finds dramatic expression within the walls of such places as the Museum of Fine Arts, the

APPLICATION FOR HOTEL AND DORMITORY ACCOMMODATIONS Hotels

1200 Beacon St. Motor Hotel Copley Square Fenway Commonwealth Motor Hotel Fenway Motor Hotel, Boston Holiday Inn Howard Johnson Motor Inn, Newton Lenox Madison Motor Inn Midtown Motor Inn Parker House Sheraton-Boston Sheraton-Plaza Somerset Statler-Hilton College Dormitories

Single

Double/Twin

Suites

$16.50-17.50 14.50-19.50

$19.50-20.50 18.50-23.50

$35.00

28.50 25.50 24.00-27.00 19.75-23.75 18.50-20.50 12.75-16.75 20.00 19.75-23.75 21.00-33.00 21.00-25.00 18.00-23.00 18.00-25.00 4.50- 8.00

24.75-30.75 21.50-30.50 16.75-21.75 26.00-28.00 24.75-31.75 32.00-38.00 27.00-31.00 25.00-32.00 27.00-32.00 9.00-16.00

56.00-79.00

45.00-100.00 55.00-85.00 65.00-125.00

MAIL TO: IUPAC Housin g Bureau, c/o Amer can Chemical Soc ety, 1155 Sixteenth Street, N.W., Washington, D.C. 20036 U.S.A. HOTEL PREFERENCE First Choice

Second Choice

Third Choice

Please reserve the following: Room(s) with 1 bed for 1 person (Single) Room(s) with 1 bed for 2 persons (Double) .Room(s) with twin beds 2 persons (Twin) Suite(s) parlor with one bedroom _Suite(s) parlor with two bedrooms College Dormitory preferred (Single occupancy

Rate preferred $_ Rate preferred $_ Rate preferred $_ Rate preferred $_ Rate preferred $_ is very limited)

_per _per _per _per _per

room. room. room. suite. suite.

ARRIVAL AND DEPARTURE DATES ARE ESSENTIAL: Arriving Boston

A.M. P.M.

Hour

Leaving

Rooms will be occupied by: Name

Address

City

Country

SIGHTSEEING Very few cities offer the visitor the wide assortment of places to go and things to see that one finds in "The Many Worlds of Boston"—a city abounding in history, culture, and natural charm. A short walk or ride brings one to Freedom Trail, the heart of historic Boston, where the many shrines bring to

NOTE: If accommodations at the hotel/dormitory of my choice are not available, I understand the Housing Bureau will make as good a reservation as possible elsewhere and that I will receive confirmation from the Housing Bureau. Deposits will be requested by some hotels and dormitories.

JUNE 7, 1971 C&EN 59

white beaches and rockbound coastline, leading to the charming fishing town of Gloucester, the a r t studios of Rockport, with winding streets and quaint restau­ rants, fanned by Atlantic breezes. The South Shore offers a different type of beauty, as one drives toward Cape Cod and stops at the town of Plymouth, steeped in tradition, and unique in the c h a r m of its waterfront. Here one sees the Plymouth Rock, where the Pilgrims first set foot on their arrival in America. Westward lie the towns of Lexington and Concord, with their village greens and white church spires—where history was indelibly recorded in the early days of the battle for independence. Further west is Sturbridge Village, a complete New England town of the early 19th century where one actually sees a re-creation of the life of that era—spin­ ning, weaving, printing, pottery making— even to the arts of the pewtersmith and the candle dipper. Many of the places described here are included in the planned tours; many of t h e m can be reached quite easily on one's own with the aid of maps which will be available to visitors in case they wish to do some extended sightseeing throughout New England after the congress adjourns. SUBWAY WALKING TOURS Tours to places of interest in Boston and Cambridge will be arranged daily. These will include: The Freedom Trail—a walking tour of Boston's historical highlights Beacon Hill—old Boston for architecture and atmosphere The New City Hall—and surrounding re­ development area Harvard University—and the University connected m u s e u m s MIT—Hayden Gallery, Chapel, and Kresge Auditorium The Museum of Science and Hayden Plenetarium The Cambridge Heritage Trail Museum of Fine Arts (Tuesday, Wednes­ day, Thursday) with its outstanding per­ m a n e n t collections of Chinese, Japanese, Indian, Mesopotamian, Egyptian, Greek, Roman, European, and American arts. Isabella Stewart Gardner Museum (Tues­ day and Thursday) a Venetian palace built in 1903 and housing the Gardner Collection of paintings, sculpture, tapes­ tries, and furnishings. There is an after­ noon concert in the courtyard. CONGRESS EVENTS Thursday Boston Harbor Cruise Enjoy the p a n o r a m a of the Boston waterfront as well as visits to the histori­ cal outer islands. Time: 6 to 8 P.M. Dinner: on your own at several water­ front restaurants Cost: $3.00 Thursday White Cliffs Vast beautiful sandy beach with Olym­ pic pool, tennis courts, golf course (ex­ t r a ) , dancing, and a traditional New England clam bake. Transportation is provided each way. Time: 3:30 P.M. through the evening. Cost: $14.50 60

C&EN JUNE 7, 1971

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j MACROMOLECULAR j PREPRINT ORDER FORM

\ j

I Enclosed is $6.00 for the two volumes I I of Preprints (including postage) I I Send to:

I

ι NAME

ι

PLANT TOURS

ADDRESS

MAIL TO: IUPAC Secretariat, 1155— 16th St., N.W., Washington, D.C. 20036

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its colorful waterfront, quaint fishing villages, artist's colony, rock heads, and beautiful views. A visit will be made to a former church remodelled into a home. Luncheon will be served in a restaurant overlooking the water. Time: 9 A.M. to 3:30 P.M. Luncheon: $3.50 (Buffet) Captains Cour­ ageous Bus: $5.00

I

LADIES' PROGRAM Tuesday Lexington, Concord, and the Wayside Inn Through Lexington by the Minuteman Statue along the route made famous by Longfellow in "The Ride of Paul Revere" to Concord, the scene of the opening of the American Revolution and the home of such literary figures as Ralph Waldo Emerson, Louisa May Alcott, and Nathaniel Hawthorne. We will visit one or more of these homes before proceed­ ing to Sudbury for luncheon and a tour at the Wayside Inn, America's oldest inn. Time: 9 A.M. to 3:30 P.M. Luncheon: $5.00 Bus: $4.75 Tuesday and Thursday Old Sturbridge Village By bus through the eastern Massa­ chusetts countryside to a recreated rural village illustrating life before the in­ dustrial revolution. In homes, shops, mills, a school, meetinghouse, and gen­ eral store brought here from various p a r t s of New England together with ex­ hibitions of accouterments of rural liv­ ing and demonstrations of crafts. A buffet luncheon featuring New England specialties will be served in the Village Tavern at a cost of $4.00. Time: 9:30 A.M. to 3:30 P.M. Cost: Admission $2.50 Luncheon: on your own or luncheon included: $4.00 Bus: $4.75 Wednesday Plimoth Plantation and Plymouth Plymouth is south of Boston and is the site where the Pilgrims landed in 1620. Here you will see a full-scale replica of the original Pilgrim colony as it was in 1627. Crafts are demonstrated. Near historic Plymouth Rock is the Mayflower II, replica of the Pilgrim ship. The tour will include Plimoth Plantation, the May­ flower II, and an opportunity to walk about the Plymouth waterfront. No for­ mal luncheon arrangements are planned and you can choose from among the many varied restaurants. Time: 9 A.M. to 3:30 P.M. Cost: Admission $2.50 Luncheon: on your own Bus: $3.25 Wednesday Rockport, Gloucester, and Cape Ann This is a t o u r of one of the most in­ teresting sections of the n o r t h shore with

Monday The afternoon is open for individual sightseeing and local tours. Arrange­ ments can be made for group visits to nearby enterprises. Suggestions are: A. Tour of Prudential Center, including "Top of the Pru," Hotel SheratonBoston and John B. Hynes Audi­ torium. B. Charles J. Connick Associates. Visi­ tors are shown the art of making stained glass windows with detailed explanations of the intricate pro­ cedures used in this ancient art. C. Christian Science Monitor. This is a most interesting trip through the working operations of the famous newspaper, located right next door to its headquarters. The m a p p a r i u m is well w o r t h seeing. Tuesday 1. Dewey & Almy Chemical Division— Cambridge and Arthur D. Little Lab­ oratories Dewey & Almy, a division of W. R. Grace Co., manufactures specialties for the metal container industry, shoe, textile, battery, concrete construction, and medi­ cal fields, and supplies various polymers and copolymers for several industries. This tour will cover the various labora­ tories, the pilot-plant laboratory, and the rubber-dipping plant. While visiting the Arthur D. Little Laboratories, one will see many chemical and engineering testing procedures for industrial applications. One particularly interesting phase is the foods laboratory, where experiments are being conducted on such characteristics as fragrance, flavor, and taste. Departure: 9 A.M. Return: 12 Noon Cost: $2.50 2. American Sugar Refinery, Manufac­ turer of Domino Cane Sugar—Charlestown A complete guided tour through the plant. Raw sugar is received from the producing areas of the world and pro­ cessed into many types of sugar; granu­ lated, liquid sugar, b r o w n sugar, and syrup. It is a round-the-clock operation. Visitors will inspect the many continuous operations: melting, filtering, centrifuging, clarification, evaporation, crystalliza­ tion, drying, screening, and packing. Departure: 1:30 PJVlT Return: 4:30 P.M. Cost: $2.50 Wednesday 3. Gillette Mfg. Co.—Andover Gillette has expanded considerably in recent years. In addition to razor blades, they manufacture a complete line of men's toiletries, including shaving cream, facial preparations, skin lotions, and hair preparations. The chemistry in­ volved in manufacturing and controlling these products is most intriguing, and

visitors will be allowed to t o u r through the production and laboratory facilities. Departure: 9 A.M. Return: 12 Noon Cost: $2.50 4. Carlings Brewery—Natick Visitors from abroad may be interested in seeing how the Americans make beer. Carlings was originally a Canadian brew­ ing company which now operates in several countries. Major equipment in­ cludes a brew kettle, lauter tubs, cereal coopers, mash mixers, fermenting, aging, and storage tanks, as well as facilities for bottling, canning, and drafting. Samples of the products will be provided at the end of the tour. Departure: 1:30 P.M. Return: 4:30 P.M. Cost: $2.50 Thursday 5. Saugus Iron Works- -Saugus This is a historic l a n d m a r k and it might properly be listed on the sightsee­

ing agenda, r a t h e r t h a n among the plant visits. As a compromise, let's classify it as a re-creation of the industrial past. Here one sees a most fascinating restora­ tion of the birthplace of America's iron and steel industry—the blast furnace, the 300-year-old forge—even a rolling and slitting mill with its pair of powerful water wheels. Three h u n d r e d years later, the I r o n Works is a source of wonder and fascination to us inhabitants of an electronic world. Departure: 9 A.M. Return: 12 Noon. Cost: $3.00 6. AVCO Corp. Here, scientific work is in progress on high-powered gas lasers, plasma dy­ namics, biomedical engineering, cardiac assist devices, and many other advanced subjects. Departure: 1:30 P.M. Return: 4:30 P.M. Cost: $2.50

EVENTS CONGRESS EVENTS Time

Ticket No.

Event

Price

Number of Tickets

Total

Thursday, July 29 6 P.M. to 8 P.M.

CE-1

Boston Harbor Cruise Limit: 150

$ 3.00

3:30 P.M. through evening

CE-2

White Cliffs

200

$14.50

Limit:

LADIES' PROGRAM Tuesday, July 27 9 A.M. to 3:30 P.M.

LP-1

Lexington, Concord, and the Wayside Inn Limit: 80

$ 9.75

9:30 A.M. to 3:30 P.M.

LP-2 LP-3

Old Sturbridge Village Luncheon included Limit: 120

$ 7.25 $11.25

PROGRAM ORGANIC CHEMISTRY SYMPOSIA MONDAY AFTERNOON AND TUESDAY MORNING AND AFTERNOON John B. Hynes Civic Auditorium Rooms G, H, and I (Second Floor)

Symposium 0-1 Application of Quantum Mechanics to Or­ ganic Reaction Paths Chairman: L Salem, Univ. de Paris-Sud, France Wee Chairman: L. C. Allen, Princeton U, U.S.A. 2:00—1. Quantitative SCF M0 Studies of Reaction Mechanisms. M. J. S. Dewar, U of Texas, U.S.A. 3:00—2. The Interaction of Particular Orbitals in Chemical Reactions. K. Fukui, Kyoto U, Japan. 4:00—3. The Chemical Consequences of Orbital Interaction through Space and through Bonds. R. Hoffmann, Cornell U, U.S.A. 9:00—4. A New Conservation Law for Or­ ganic Reactions. L. C. Allen, Princeton U, U.S.A. 10:00—5. Nonempirical LCA0 M0-SCF Cal­ culations on Potential Energy Surfaces for Electrophilic Additions to Olefins. D. T. Clark, U of Durham, England. 11:00—6. Empirical and Semiempirical Calculations for Reaction Paths. M. Simonetta, U of Milan, Italy. 2:00—7. The Potential Surfaces for the Addition Reactions of 7r-Systems. M. V. Basilevsky, V. A. Tikhomirov, Karpov Inst., U.S.S.R. 3:00—8. Ab Initio Conformational Analy­ sis: Nonempirical Studies of Conforma­ tional Processes. J. M. Lehn, U of Strasbourg, France. 4:00—9. Some Concepts in Reaction Dy­ namics. J. C. Polanyi, U of Toronto, Canada.

MONDAY AFTERNOON AND TUESDAY MORNING AND AFTERNOON

Wednesday, July 28 9 A.M. to 3:30 P.M.

LP-4

Plimoth Plantation

$ 5.75

9 A.M. to 3:30 P.M.

LP-5

Rockport, Gloucester and Cape Ann Limit: 200

$ 8.50

John B. Hynes Civic Auditorium Rooms A and Β (First Floor)

Old Sturbridge Village Luncheon included Limit: 120

$ 7.25 $11.25

Symposium 0-2 Short-Lived Intermediates Chairman: P. S. Skell, Pennsyl­ vania State U, U.S.A.

Thursday, July 29 9:30 A.M. to 3:30 P.M.

LP-6 LP-7

PLANT TOURS Tuesday, July 27 9 A.M. to 12 Noon

PT-1

Dewey & Almy Chemical Division—Cambridge and Arthur D. Little Laboratories Limit: 45

$ 2.50

1:30 P.M. to 4:30 P.M.

PT-2

American Sugar Refinery Charlestown Limit: 45

$ 2.50

9 A.M. to 12 Noon

PT-3

Gillette Mfg. Co.—Andover Limit: 45

$ 2.50

1:30 A.M. to 4:30 P.M.

PT-4

Carlings Brewery—Natick Limit: 45

$ 2.50

9 A.M. to 12 Noon

PT-5

Saugus Iron Works— Saugus Limit: 45

$ 3.00

1:30 P.M. to 4:30 P.M.

PT-6

AVCO Corporation Limit: 45

$ 2.50

Wednesday, July 28

Thursday, July 29

Please send checks with order

TOTAL $_

2:00—10. Radical Intermediates by a New NMR Technique. H. Fischer, U of Zurich, Switzerland. 2:45—11. Chemically Induced Nuclear Polarization as a Tool for the Study of Free Radical Reactions. G. L. Closs, U of Chicago, U.S.A. 3:30—12. Formation of Radical Anions by the Attack of Radicals Upon Anions. G. A. Russell, Iowa State U, U.S.A. 4:15—13. Substitution and Elimination Reactions which Proceed via Radical Anion Intermediates. N. Kornblum, Pur­ due U, U.S.A. 9:00—14. Studies on Hetero- and MetalSubstituted Carbenes and Diazo Com­ pounds. U. Schollkopf, M. Reetz, B. Banhidai, H.-U. Scholz, U of Gottingen, West Germany. 9:45—15. Dehydroaromatics and Related Species. C. W. Rees, T. L. Gilchrist, R. C. Stoor, U of Liverpool, England. 10:30—16. Photooxidation of Sulfides. C. S. Foote, J. W. Peters, U of California, U.S.A. 11:15—17. The Chemistry of Aliphatic Nitrogen Cation Radicals. N. C. Deno, K. Eisenhardt, R. Fishbein, C. Pierson, D. Pohl, H. Spinelli, R. C. White, J. Wyckoff, Pennsylvania State U, U.S.A. 2:00—18. Divalent Silicon Intermediates. D. R. Weyenberg, Dow Corning Corp., U.S.A. 2:45—19. Atomic Chemistry of Sulfur and the Group Via Elements. 0. P. Strausz, U of Alberta, Canada. JUNE 7, 1971 C&EN

61

3:30—20. High-Temperature Organic Reac­ tions by Flash-Vacuum Pyrolysis. E. Hedaya, Union Carbide Research Inst., U.S.A. 4:15—21. Chemistry of Magnesium and Silicon Atoms. P. S. Skell, J. E. Girard, P. W. Owen, Pennsylvania State U, U.S.A.

MONDAY AFTERNOON AND TUESDAY MORNING AND AFTERNOON Sheraton-Boston Hotel Grand Ballroom (Second Floor)

Symposium 0-3 Spectroscopy in Structure Determination Chairman: K. Nakanishi, Co­ lumbia U, U.S.A. Wee Chairman: F. W. McLafferty, Cornell U, U.S.A. 2:00—22. Ion Cyclotron Resonance. J. I. Brauman, Stanford U, U.S.A. 3:00—23. Photoelectron-Spectroscopy. E. Heilbronner, U of Basel, Switzerland. 4:00—24. ESCA. B. J. Lindberg, U of Uppsala, Sweden. 9:00—25. High-Resolution Mass Spectrom­ etry. F. W. McLafferty, Cornell U, U.S.A. 10:00—26. 1;5C Nuclear Magnetic Reso­ nance Spectroscopy. J. D. Roberts, Cali­ fornia Inst, of Technology, U.S.A. 11:00—27. X-Ray Determination of Struc­ ture. J. M. Robertson, U of Glasgow, Scotland. 2:00—28. Circular Dichroism. The Cotton Effect of Aromatic Chromophores. G. Snatzke, U of Bonn, West Germany. 3:00—29. Infrared Studies of Nucleic Acids. M. Tsuboi, Tokyo U, Japan. 4:00—30. Laser-Raman Spectroscopy of Biological Macromolecules. R. C. Lord, Massachusetts Inst, of Technology, U.S.A.

WEDNESDAY MORNING AND AFTERNOON John B. Hynes Civic Auditorium Rooms A and Β (First Floor)

Symposium 0-4 New Natural Product Syntheses In Memory of M. M. Shemyakin*

Chairman: K. Folkers, U of Texas, U.S.A. Wee Chairman: A. Battersby, U of Cambridge, England 9:00—31. Rational Synthetic Routes to Depsipeptides from the Standpoint of Their Structure Function Relations. Yu. A. Ovchinnikov, Academy of Sciences, USSR 10:00—32! Some Synthetic Studies in An­ tibiotic Chemistry. D. H. R. Barton, Imperial College, England. 11:00—33. New Developments in the Syn­ theses of Aminoglycosidic Antibiotics. S. Umezawa, Keio U, Japan. 2:00—34. The Total Synthesis of the Pentacyclic Triterpene Lupeol. G. Stork, Columbia U, U.S.A. 3:00—35. Synthesis of Hypothalamic Neu­ rohormones. K. Folkers, U of Texas, U.S.A. 4:00—36. Recent Advances in the Chem­ istry of Natural Products. R. M. Wood­ ward, Harvard U, U.S.A. * Professor Shemyakin of the Academy of Sciences, U.S.S.R., was to have been chair­ man and had organized this symposium prior to his untimely death on June 26, 1970.

WEDNESDAY MORNING AND AFTERNOON Sheraton-Boston Hotel Grand Ballroom (Second Floor)

Symposium 0-5 Intramolecu­ lar Rearrangements, Valence Isomerization, and Cycloaddi­ tion Chairman: J. A. Berson, Yale U, U.S.A. Wee Chairman: M. R. Willcott, U of Houston, U.S.A. 9:00—37. Ring Opening Reactions of Aziridines and Oxiranes. R. Huisgen, A. Dahmen, H. Hamberger, H. Hermann, H. Huber, H. Mader, V. Markowski, W. Scheer, U of Munich, West Germany. 9:50—38. The Geometric Isomerization of Cyclopropane: An Attempt at the Total Resolution of an Organic Transition State. L Salem, U de Paris-Sud, France. 10:50—39. The Thermocyclization of Un­ saturated Carbonyl Compounds. J. M. Conia, U de Paris-Sud, France. 62

C&EN JUNE 7, 1971

11:30—40. Mechanism in the System of Dimers of Butadiene. W. von E. Doering, Harvard U, U.S.A. 1:30—41. 7r-Bonds Shift and ?r-Bonds Delocalization in Some Annulenes, Their Radical Anions and Dianions. J. F. M. 0th, Swiss Federal Inst, of Technology, Switzerland. 2:20—42. Recent Developments in Aro­ matic Sigmatropic Rearrangements and Related Reactions. H. Schmid, U of Zurich, Switzerland. 3:10—43. ΙΟττ-Electron Analogs of Tropylium Ion, Tropone, and the Tropolones. E. Vogel, U of Cologne, West Germany. 4:00—44. Thermal and Radical-Induced Isomerization of Pentamethyl-Homofulvenes. R. Criegee, D. Schonleber, R. Huber, C. Schweickhardt, Th. P. Carter, U of Karlsruhe, West Germany.

WEDNESDAY MORNING AND AFTERNOON John B. Hynes Civic Auditorium Rooms G, H, and I (Second Floor)

Symposium 0-6 Insect Chem­ istry Chairman: A. J. Birch, Aus­ tralian National U, Australia 9:00—Introductory Remarks. A. J. Birch. 9:10—45. Sex Attractants of Coleoptera. R. M. Silverstein, College of Forestry at Syracuse U, U.S.A. 10:00—46. Recent Developments in the Study of Chemical Defense and Commu­ nication Mechanisms Among Arthropods. J. Meinwald, T. Eisner, Cornell U, U.S.A. 11:00—47. Insect Sex Pheromones. M. Beroza, U.S. Dept. of Agriculture, U.S.A. 2:00—48. Studies on Insect Hormones. J. B. Siddall, R. J. Anderson, B. J. Bergot, L. L. Dunham, W. Hafferl, C. A. Henrick, D. S. King, Zoecon Corp., U.S.A. 3:00—49. Ecdysones and Related Com­ pounds. K. Nakanishi, Columbia U, U.S.A. 4:00—50. Areas of Chemistry of Critical Concern to Insect Biologists. T. R. Odhiambo, U of Nairobi, Kenya.

2:00—60. Transition Metal Complexes of Macrocyclic Ligands. A. W. Johnson, U of Sussex, England. 3:00—61. Some Chemistry of Methylidynetricobalt Nonacarbonyls. D. Seyferth, Massachusetts Inst, of Technology, U.S.A. 4:00—62. Transition Metal Carbene Com­ plexes—New Spectroscopic and Prepara­ tive Results. C. G. Kreiter, E. 0. Fischer, U of Munchen, West Germany.

THURSDAY MORNING AND AFTERNOON John B. Hynes Civic Auditorium Rooms A and Β (First Floor)

Symposium 0-9 Photochem­ istry Chairman: E. Havinga, U of Leyden, the Netherlands Wee Chairman: 0. L. Chap­ man, Iowa State U, U.S.A. 9:00—63. Photochemical Studies at Low Temperature: Mechanism and Synthesis. 0. L. Chapman, Iowa State U, U.S.A. 10:00—64. Recent Studies on the Photo­ chemistry of Conjugated Trienes and Higher Polyenes. R. S. H. Liu, Y. Butt, U of Hawaii, U.S.A. 11:00—65. Photochemical Modification of Biologically Significant Compounds. D. Elad, Weizmann Inst, of Science, Israel. 2:00—66. The Photochemical Reactions of the Thiocarbonyl Group. P. de Mayo, C. C. Liao, A. Lawrence, R. 0. Loutfy, A. A. Nicholson, U of Western Ontario, Canada. 3:00—67. Chemical and Photochemical Re­ actions of Endoperoxides. J. Rigaudy, J.-J. Basselier, Ecole Supérieure de Physique et de Chimie Industrielles, France. 4:00—68. Photochemistry of Unsaturated Ketones. K. Schaffner, Eidgenossische Technische Hochschule, Switzerland.

FRIDAY MORNING AND AFTERNOON Sheraton-Boston Hotel Grand Ballroom (Second Floor)

THURSDAY MORNING AND AFTERNOON Sheraton-Boston Hotel Grand Ballroom (Second Floor)

Symposium 0-7 General Methods of Synthesis Chairman: P. Yates, U of To­ ronto, Canada Vice Chairman: P. E. Eaton, U of Chicago, U.S.A. 9:00—51. New Reactions in Organic Syn­ thesis. D. H. R. Barton, Imperial Col­ lege, England. 10:10—52. Syntheses of Cross-Conjugated Carbo- and Heterocyclic 7r-Electron Sys­ tems. K. Hafner, Technischen Hochschule Darmstadt, West Germany. 11:20—53. New Developments in the Organoboranes. H. C. Brown, Purdue U, U.S.A. 2:00—54. General Methods for the Con­ struction of Complex Molecules. E. J. Corey, Harvard U, U.S.A. 3:10—55. Studies on Organic Synthesis. A. Eschenmoser, Swiss Federal Inst, of Technology, Switzerland. 4:20—56. Organic Syntheses by Means of Transition Metal Complexes. J. Tsuji, Toray Industries, Inc., Japan.

THURSDAY MORNING AND AFTERNOON John B. Hynes Civic Auditorium Rooms G, H, and I (Second Floor)

Symposium 0-8 Organo-Transition Metal Chemistry Chairman: R. S. Nyholm, U College of London, England 9:00—57. Unusual Structures and Unimolecular Structural Rearrangements in Metal-Polyolefin Complexes. F. A. Cot­ ton, J. L. Calderon, D. Ciapenelli, B. G. DeBoer, G. Deganello, M. D. LaPrade, C. R. Reich, Massachusetts Inst, of Technology, U.S.A. 10:00—58. The Chemical Bond in Organotransition Metal Compounds. Some Re­ cent Developments. R. Mason, U of Sheffield, England. 11:00—59. Structure and Reactions of Chelated Metal-Olefin Complexes. R. S. Nyholm, U College of London; J. Lewis, Cambridge U, England.

Symposium 0-10 Medicinal Chemistry Chairman: B. M. Bloom, Chas. Pfizer & Co., Inc., U.S.A. 9:00—Introductory Remarks. Β. Μ. Bloom. 9:05—69. Fertility Control. C. Djerassi, Stanford U, U.S.A. 10:30—70. Studies on the Acetylcholine Receptor of the Eel Electroplax. J. P. Changeux, Pasteur Inst., France. 1:00—71. Structural Modifications of Penicillins. K. Heusler, Ciba-Geigy Ltd., Switzerland. 2:00—72. Immunosuppressant Drugs. W. J. Wechter, Upjohn Co., U.S.A. 3:00—73. Interferon Inducers in Anti­ viral Research. J. F. Niblack, Chas. Pfizer & Co., Inc., U.S.A.

FRIDAY MORNING AND AFTERNOON Sheraton-Boston Hotel Fairfax Room (Third Floor)

Symposium 0-11 Free Radi­ cals and Homolytic Mecha­ nisms Chairman: M. Julia, U of Paris, France Wee Chairman: F. D. Greene, Massachusetts Inst, of Tech­ nology, U.S.A. 9:00—74. Structure Reactivity-Relations in the Chemistry of Aliphatic Free Radicals. C. Riichardt, H. D. Beckhaus, J. Bonnekessel, H. Bock, F. A. Groeger, V. Golzke, G. Hamprecht, K. Herwig, J. Hinz, P. Lorenz, I. Mayer-Ruthardt, J. Miiller, A. Oberlinner, E. Schacht, U of Munster, West Germany. 10:00—75. Factors Influencing Reactivity of Free Radicals in Very Fast Reactions. G. S. Hammond, H. J. Hefter. S. I. Wiener, E. J. Hamilton, A. Gupta, Cali­ fornia Inst, of Technology, U.S.A. 11:00—76. Aspects of Radical Pairs and Biradicals. P. D. Bartlett, Harvard U, U.S.A. 1:00—77. The Role of Free Radicals in Oxidation and Reduction. W. A. Waters, Oxford U, England. 2:00—78. Free Radicals in Chemical Chain Reactions and Biological Processes. N. M. Emanuel, Academy of Sciences, U.S.S.R.

3:00—79. The Oxidation and Reduction of Free Radicals by Metal Complexes. J. K. Kochi, Indiana U, U.S.A.

FRIDAY MORNING AND AFTERNOON John B. Hynes Civic Auditorium Rooms A and Β (First Floor)

Symposium 0-12 Small Rings Chairman: E. Schmitz, Acad­ emy of Sciences, East Germany Wee Chairman: W. Lwowski, New Mexico State U, U.S.A. 9:00—80. Theory of the Structure and Reactivity of Small Rings. R. Hoffmann, Cornell Univ., U.S.A. 10:00—81. Photochemistry of Some ThreeMembered Heterocycles. A. M. Trozzolo, T. DoMinh, Bell Telephone Labs. Inc., U.S.A. 10:30—82. Heterocyclic Four-Membered Rings via Polar Cycloaddition Reactions of Heterocumulenes. H. Ulrich, The Upjohn Co., U.S.A. 11:00—83. Carboxylic Three-Membered Rings Containing Endo- and Exo-Double Bonds. R. R. Kostikov, State Univ. of Leningrad, U.S.S.R. 1:30—84. Routes to Small Ring Antiaromatic Systems. C. W. Rees, Univ. of Liverpool, England. 2:00—85. Some Highly Reactive Diazirines. E. Schmitz, Academy of Sciences, East Germany. 2:30—86. Biologically Active Diaziridines and Diazirine Compounds. P. Borrevang, NOVO Terapeutisk Lab, Denmark. 3:00—87. The Invertomers of Diaziridines and Oxaziridines. A. Mannschreck, W. Seitz, U of Heidelberg, West Germany. 3:30—88. Ring-Chain Isomerism in SmallRing Heterocycles. F. D. Greene, R. L. Camp, L. Kim, J. F. Pazos, D. B. Sclove, C. Wilkerson, Massachusetts Inst, of Technology, U.S.A.

FRIDAY MORNING AND AFTERNOON John B. Hynes Civic Auditorium Rooms G, H, and I (Second Floor)

Symposium 0-13 Biosynthe­ sis Chairman: D. Arigoni, Eidgen­ ossische Technische Hoch­ schule, Switzerland Wee Chairman: A. I. Scott, Yale U, U.S.A. 9:00—89. Recent Biosynthetic Researches. A. R. Battersby, Cambridge U, England. 10:00—90. Recent Progress in the Search for Biosynthetic Intermediates. A. I. Scott. Yale U, U.S.A. 11:00—91. Biosynthetic Routes from Ly­ sine to the Piperdine Nucleus. I. D. Spenser, McMaster U. Canada. 1:00—92. How Penicillin Kills Bacteria Best: Progress and Problems. J. L. Strominger, Harvard U, U.S.A. 2:00—93. Biogenetic Pathways of Fungal Metabolites. Ch. Tamm, U of Basel, Switzerland. 3:00—94. Bioorganic Chemistry of Triterpenoid and Steriods Synthesis. Ε. Ε. van Tamelen, Stanford U, U.S.A.

Contributed Papers MONDAY AFTERNOON Sheraton-Boston Hotel Gardner Room (Third Floor)

Oral Presentation O-C-4 Intramolecular Rear­ rangements, Valence Isomeri­ zation, and Cycloaddition Presiding Officer: G. Schroder, U of Karlsruhe, West Germany 2:00—95. Synthesis and Properties of OXA- and ΑΖΑΓ17] Annulenes and of 1Chloro-2-Fluoro [18] Annulene. G. Schroder, G. Heil, R. Neuberg, G. Plinke, J. F. M. Oth, U of Karlsruhe, West Ger­ many. 2:15—96. Nonatetraenyl Anions. S. Bren­ ner, R. B. Bates, B. I. Mayall, U of Ari­ zona. U.S.A. 2:30—97. A Thermal Rearrangement Ap­ proach to the Synthesis of Bicycloheptatrienyl Derivatives. R. G. Bergman, M. B. D'Amore, R. R. Jones, California Inst, of Technology, U.S.A.

2:45—98. Stereochemistry of and Alteration in the Mechanism of the Spiropentane Thermal Rearrangement by Polar Substituents. J. J. Gajewski, L. T. Burka, Indiana U, U.S.A. 3:00—99. Dimerization of Chloroprene and Related Dienes. C. A. Stewart, Jr., E. I. du Pont de Nemours & Co., Inc., U.S.A. 3:15—100. Stereoselective [6 + 4] Cycloadditions of 6-Methylfulvene and 6Phenylfulvane to Tropone. K. N. Houk, L. J. Luskus, N. S. Bhacca, Louisiana State U, U.S.A. 3:30—101. Orbital Considerations Affecting Regioselectivity in Cycloadditions. Conformation of Fused Cyclobutanones. A. Hassner, D. P. G. Hamon, U of Colorado, U.S.A. 3:45—102. A Convenient Stereospecific Fixation of Double Bonds Via Thermolysis of ^-Lactones. W. Adam, J. Baeza, U of Puerto Rico, P.R. 4:00—103. An Anomalous Rearrangement of l-Bromo-2-Benzylaminoalkanes. S. Tsuboyama, K. Tsuboyama, A. Ohta, S. Tanji, M. Yanagita, Inst, of Physical and Chemical Research, Saitama, Japan. 4:15—104. Compounds Containing More Than Three Sulfur Atoms Exhibiting Partial Bonding Phenomena. Syntheses and Properties. N. Lozac'h, M. Stavaux, A. Josse, Ecole National Supérieure de Chimie, Caen, France. 4:30—105. Thermal Routes to Sulfenes: The "Sulfo-Cope" Rearrangement. J. F. King, D. R. K. Harding, U of Western Ontario, Canada. 4:45—106. A Synthesis of 1,4-DithiocinsIOTT Electron Heterocycles. D. L. Coffen, Y. C. Poon, U of Colorado, U.S.A.

Publication Only 107.—Hidden Rearrangements in the Mass Spectral Decomposition of Cycloheptatriene. A Unified Mechanism for the Formation

of

the

CTH-*

Ion.

M.

K.

Hoffman, U of North Carolina, U.S.A. 108.—Rearrangement of Vinylmethylenecyclopropane. K. H. Leavell, W. E. Billups, E. S. Lewis, Rice U, U.S.A. 109.—Trimethylsilyl Migrations of Cyclopropanetrimethylsilanes. A. J. Ashe, I I I , U of Michigan, U.S.A. 110.—Kinetics of the Thermal Rearrangements of 6,6,-Dihalobicyclo[3.1.0]Hexanes and Their OXA Analogs. R. C. De Selms, U. T. Kreibich, Eastman Kodak Co., U.S.A. 111.—Cycloaddition of Benzyne to Substituted Cyclopentadienes and Cyclopentadienyl Grignard Reagents. W. T. Ford, U of Illinois, U.S.A. 112.—The Effect of Structural Variations on Rates of Enolene Rearrangements. R. M. Roberts, A. R. Tanner, U of Texas, U.S.A. 113.—Cycloaddition Reactions of Pyrylium Betaines. K. T. Potts, M. Sorm, Rensselaer Polytechnic Inst., U.S.A. 114.—Kinetic Study of the Substituent Effect in the Pyrolytic Rearrangement of l-Benzoyl-2,2-Dimethylaziridines. P. E. Fanta, C. H. Chang, Illinois Inst, of Technology, U.S.A. 115.—Preparation of Acyclic Isoimides and Their Rearrangement Rates to Imides. J. S. P. Schwarz, Nease Chemical Co., Inc., U.S.A. 116.—Thermal Chemistry of Aliphatic Amine Oxide-N,N-DimethylhydroxylamineOlefin Systems. R. G. Laughlin, Procter & Gamble Co., U.S.A. 117.—Mechanistic and Synthetic Aspects of the Meisenheimer Rearrangement. E. Ciganek, E. I. du Pont de Nemours & Co., Inc., U.S.A. 118.—Formation of Apparent Para-Benzidinic Rearrangement Products During Indoles Syntheses. V. Boido, F. Sparatore, G. Pirisino, U of Sassari, Italy. 119.—The 2-(a,a-Dichlorobenzyl) Phenylphosphorodichloridate to 2-Chlorobenzophenone Rearrangement. A. G. Pinkus, T. C. Chang, Baylor U, U.S.A.

TUESDAY MORNING AND AFTERNOON Sheraton-Boston Hotel Gardner Room (Third Floor)

Oral Presentation O-C-9 Synthetic Organic Chemistry Presiding Officer: E. B. Pedersen, U of Aarhus, Denmark 9:00—120. The Synthesis, Structure, and Reactions of a Benziodolium Cation. F. M. Beringer, P. Ganis, G. Avitabile, H. Jaffe. Polytechnic Inst, of Brooklyn, U.S.A. 9:15—121. Diheterotricyclodecanes. Synthetic and Mechanistic Studies. C. Ganter, Swiss Federal Inst, of Technology, Switzerland.

9:30—122. Specific Chlorination of Some Selected Esters Using Copper(ll) Chloride/Lithium Chlpride/Sulfolane. R. Louw, P. E. Prillwitz, U of Leyden, the Netherlands. 9:45—123. About C- And O-Alkylation of Thallium(l) Salts of 3-Thiolene-2-Ones. E. B. Pedersen, S.-O. Lawesson, υ of Aarhus, Denmark. 10:00—124. Methylation of 1-N-Arylsulfonyl Carbamates and Ureas with Diazomethane. W. H. Daly, C. W. Heurtevant, Louisiana State U, U.S.A. 10:15—125. Synthesis of Epithio-Norboranes Using Arenethiosulfenyl Chlorides. T. Fujisawa, T. Kobori, Sagami Chemical Research Center, Japan. 10:30—126. Crown Polyether Chemistry. Potassium Permanganate Oxidations in Benzene. D. J. Sam, H. E. Simmons, E. I. du Pont de Nemours & Co., Inc., U.S.A. 10:45—127. Oxepine Aus Cyclohexadiendiolen? A. Rieker, S. T. Berger, U of Tubingen, West Germany. 11:00—128. Novel Heterocyclic Syntheses from Encarbamoyl Chlorides. J. P. Chupp, Monsanto Co., U.S.A. 11:15—129. Synthetic Studies on the Tricothecane Group of Phytotoxic Mould Metabolites. R. A. Raphael, E. W. Colvin, S. Malchenko, J. S. Roberts, U of Glasgow, Scotland. 11:30—130. Synthesis of Diterpenoid Acids. Cyclizations with Malonic Ester. D. M. S. Wheeler, A. Kroniger, U of Nebraska, U.S.A. 11:45—131. Synthesis of 1,3,5,7,9-Pentacarbonyl Compounds. T. M. Harris, G. P. Murphy, Vanderbilt U, U.S.A. 2:00—132. Synthesis of Zizaene. R. M. Coates, R. L. Sowerby, U of Illinois, U.S.A. 2:15—133. 2-Aroyl-l,3-benzodioxoles of Anticipated Pesticidal Activity and Their Cleavage with Hydrazines; a New Route to Arylglyoxal Osazones. N. Latif, S. A. Meguid, National Research Center, U.A.R. 2:30—134. Novel Nucleophi lie Substitu­ tions of Alkyl Bromo-2[lH]-Pyridones. B. E. Witzel, P. Graham, J. Carty, C. P. Dorn, R. L. Clark, T. Y. Shen, A. A. Pessolano, Merck Sharp & Dohme Re­ search Labs, U.S.A.

Publication Only 135.—Amino-Protecting Groups Removable by Neighboring Group Assistance: The o-Phenazophenoxyacetyl Moiety. C. A. Panetta, A. U. Rahman, U of Mississippi, U.S.A. 136.—Synthesis of α,α-Dichlorosulfenyl Chlorides. W. G. Phillips, K. W. Ratts, Monsanto Co., U.S.A. 137.—Chemistry of Sulfonate Esters Over Alumina. G. H. Posner, R. Johnson, M. Whalen, Johns Hopkins U, U.S.A. 138.—Synthesis of Thioethers by Cleavage of C-0 bonds with Mercaptides. R. W. Weiss, Monsanto Co., U.S.A. 139.—Bicyclo[8.8.8]Hexacosanes: Synthe­ sis and Stereochemistry. C. H. Park, H. E. Simmons, E. I. du Pont de Nemours & Co., Inc., U.S.A. 140.—Rearrangement of Pinane Ethers. P. D. Magnus, N. Bosworth, Imperial Col­ lege, England. 141.—A New Synthesis of Cyclopropanecarboxylic Acids. W. T. Brady, J. P. Hieble, North Texas State U, U.S.A. 142.—The Reactions of Some Nucleophiles with 7-Substituted Nor-Caranes and NorCarenes. D. S. Wulfman, B. W. Peace, U of Missouri, U.S.A. 143.—Synthetic Approaches to Potentially Bicycloaromatic C n H n Carbonium Ions. J. T. Groves, C. A. Bernhardt, M. Ebner, U of Michigan, U.S.A. 144.—Reductive Dehalogenation of Cyclic Halogenated Hydrocarbons. F. Korte, U of Bonn, West Germany. 145.—The Synthesis of Macrocyciic Azo Compounds with Annulene Perimeters. P. Skrabal, H. Zollinger, Swiss Federal Inst, of Technology, Switzerland. 146.—Alkylation of 10-Alkyl-9,10-Dihydroanthracenyllithiums with Alkyliodides. H. E. Ziegler, L. T. Gelbaum, R. Litman, I. Angres, Brooklyn College, City U of New York, U.S.A. 147.—Metal-Ammonia Reduction: Regiospecificity and Stereospecificity of Re­ duction and Reductive Alkylation in the Terphenyl Series. D. F. Lindow, R. G. Harvey, U of Chicago, U.S.A. 148.—Ring Expansion of Some Chloromethyl[l,5-c]Quinazolines and a 1,2,4Benzothiadiazine 1,1-Dioxide W. J. Zally, G. F. Field, L. H. Sternbach, Hoff­ mann-La Roche, Inc., U.S.A. 149.—The Direct Silylation of Pyridine. C. S. Giam, K. Lowery, Jr., Texas A&M U, U.S.A. 150.—Facile Synthesis of 9-Alkylpurines: Preparation of Some 9-Ethylpurine De­ rivatives. M. Israel, N. Muhammad, M. M. Berman, E. J. Modest, Children's Cancer Research Foundation, U.S.A.

151.—Synthesis of D-Alanyl-D-Cycloserine. C. S. Levine, C. H. Stammer, U of Georgia, U.S.A. 152.—Electrolytic Oxidation of Some 1Benzyl-l,2,3,4-Tetrahydroisoquinolines. J. M. Bobbitt, R. C. Hallcher, U of Con­ necticut, U.S.A. 153.—2-Benzyl-l,3,4-Oxadiazolin-5-One and Related Compounds. F. D. Popp, G. M. Rosen, F. Q. Gemmill, Jr., Clarkson Col­ lege of Technology, U.S.A. 154.—Total Synthesis of Methyl 3,4-Dideoxyand 3,4,6-Trideoxy-DL-Hex-3-Enopyranosides. A. Zamojski, A. Banaszek, Acad­ emy of Sciences, Poland. 155.—Tetrahydro-3-Benzazepines, Hexahydro-3-Benzazocines and Hexahydro-4-Benzazonines. B. Pecherer, R. C. Sunbury, F. Humiec, A. Brossi, Hoffmann-La Roche, Inc., U.S.A. 156.—Reactions of l,2-Dihydro-2-Phenylpyridyllithium. Carbon vs. Nitrogen Sub­ stitution. C. S. Giam, E. E. Knaus, Texas A&M U, U.S.A. 157.—Synthesis of Yohimbine-Type Alka­ loids. Dieckmann Ring Closure of Un­ saturated Diesters. Cs. Szantay, L Toke, K. Honty, Technical U of Buda­ pest, Hungary. 158.—The Reduction of Steroidal a,)3-0xidoketones with Chromous Acetate. C. H. Robinson, R. Henderson, Johns Hopkins U School of Medicine, U.S.A. 159.—Deacetoxylation of 17-0-Acetoxysteroids on Alumina. R. Kanojia, I. Scheer, Ortho Pharmaceutical Corp.; S. Rovinski, Ciba Pharmaceutical Co.; L. Yarmchuck, Hoffmann-La Roche, Inc., U.S.A. 160.—Progress on Total Synthesis of Cio Gibberellins. H. J. E. Loewenthal, Y. Satati, S. Schatzmiller, Inst, of Technol­ ogy, Israel. 161.—Approaches to the Synthesis of Phthalideisoquinoline and Aporphine Alka­ loids. G. G. Lyle, W. L. Mancini, U of New Hampshire, U.S.A. 162.—Cinchona Alkaloids from Synthetic Quinuclidine Precursors. G. Grethe, H. L. Lee, T. Mitt, M. Uskokovic, HoffmannLa Roche, Inc., U.S.A. 163.—Synthetic Approaches to Camptothecin. R. E. Lyle, J. A. Bristol, M. J. Kane, U of New Hampshire, U.S.A.

TUESDAY AFTERNOON Sheraton-Boston Hotel Gardner Room (Third Floor)

Oral Presentation O-C-1 Medicinal Chemistry Presiding Officer: L. G. H um­ ber, Ayerst Research Labs, Canada 2:45—164. 2-Acyl-A-norandrost-l-enes. R. M. Scribner, E. I. du Pont de Nemours & Co., U.S.A. 3:00—165. New Ant if erti I ity Agents: Syn­ thesis of B-Secoestrone and Derivatives. J. S. Bindra, A. T. Neyyarappally, N. Anand, Central Drug Research Inst., In­ dia. 3:15—166. The Synthesis and Biological Activity of lljS Alkyl-19-Norsteroids. J. S. Baran, I. Laos, S. E. Mares, E. F. Nutting, G. D. Searle & Co., U.S.A 3:30—167. Approaches to the Synthesis of Nucleocidin and Its Analogs. I. Jenkins, J. P. H. Verheyden, J G. Moffatt, Syntex Research, U.S.A. 3:45—168. The Oxidation of Aqueous LPhenylalanine by CO(60)-Gamma-lrradiation. A. Ehrl, Gesellschaft fur Strahlenforschung, West Germany. 4:00—169. Active Sites of the Aromatic Hydrocarbons with Reference to Their Possible Mechanism of Carcinogenesis. E. Cavalieri, M. Calvin, U of California, U.S.A. 4:15—170. Intramolecular Charge-Transfer in 2, 6-Diiododiphenyl Ethers and Its Relation to Thyromimetic Activity. P. A. Lehmann F.f Inst. Politecnico Nacional, Mexico. 4:30—171. A Novel Group of Indole De­ rivatives. Syntheses and Pharmacologi­ cal Properties. B. F. Lundt, 0. Ladefoged, W. Andersen, NOVO Terapeutisk Lab. A/S, Denmark. 4:45—172. The Chemistry and Pharma­ cology of 5-Methylene-4-Substituted Dibenzo[a,d] Cycloheptenes. L. G. Humber, F. Herr, M.-P. Charest, Ayerst Re­ search Labs, Canada.

Publication Only 173.—Potential Antitumor Agents. VII. 4'-Diethyleneoxy Derivatives of a-(N)Heterocyclic Carboxaldehyde Thiosemicarbazones. K. C. Agrawal, B. A. Booth, A. C. Sartorelli, Yale U School of Medi­ cine, U.S.A. 174.—Synthesis of Lactam Analogs of Actinomycin. E. Atherton, R. P. Patel, J. Meinenhofer, Children's Cancer Re­ search Foundation, U.S.A.

175.—Synthesis of Fluorescent Tetracyclic Derivatives of Actinomycin D. S. K. Sengupta, S. K. Tinter, E. J. Modest, Children's Cancer Research Foundation, U.S.A. 176.—Structure/Activity Relationship of the Pyoluteorin Antibiotics. A. H. Rees, K. Bailey, G. R. Birchall, D. G. Durham, C. G. Hughes, Trent U, Canada. 177.—A Very Reactive Analog of the 0Lactam Antibiotics. P. N. Edwards, Imperial Chemical Industries Ltd., En­ gland. 178.—An Approach to the Synthesis of 6-Methyl Penicillin G. M. R. Bell, R. Oesterlin, S. D. Clemans, J. A. Carlson, Sterling-Winthrop Research Inst., U.S.A. 179.—Synthesis of Vinyl and Acetylene An­ alogs of Pyridoxal and Their Activity as Substrates or Inhibitors of Vitamin Bo Metabolizing or Dependent Enzymes. W. Korytnyk, B. Lachmann, N. Angelino, G. Potti, Roswell Park Memorial Inst., U.S.A. 180.—A New Antifilarial Agent: 3-Ethyl-8Methyl-l,3,8-Triazabicyclo[4,4,0] Decan2-One. R. Bindra, R. N. Iyer, N. Anand, Central Drug Research Inst., India. 181.—The Synthesis of Novel Adenosine Nucleoside and Nucleotide Analogs. M. S. Henderson, D. H. Rammler, Syntex Research, U.S.A. 182.—Molecular Complementariness at the Muscarinic Receptor. G. H. Cocolas, E. C. Robinson, W. L. Dewey, T. C. Spaulding, U of North Carolina, U.S.A. 183.—C-20 Epimeric 22-Aza- and 22,25 Diazacholesterols. F. Kohen, V. V. Ranade, M. C. Lu, R. E. Counsell, U of Michigan, U.S.A. 184.—Inhibition of Cholesterol Side-Chain Cleavage by Epimeric Aza Cholestérols. M. Lu, P. Afiatpour, R. E. Counsell, U of Michigan, U.S.A. 185.—Some Tetrazolosteroids. H. Singh, R. B. Mathus, V. V. Parashar, P. P. Sharma, Panjab U, India

WEDNESDAY MORNING Sheraton-Boston Hotel Gardner Room (Third Floor)

Oral Presentation O-C-6 Organo-lnorganic Chemistry Presiding Officer: B. JezowskaTrzebiatowska, U of Wroclaw, Poland 9:00—186. Some Recent Studies on Metal Complexes of t-Butyl Isocyanide. R. B. King, M. S. Saran, U of Georgia, U.S.A. 9:15—187. Reactions of Cyclopentadienylmetaldialkylamides. D. C. Bradley, A. Janzen, A. S. Kasenally, Queen Mary College, England. 9:30—188. NMR Studies on the Redistribution of Halides and Pseudohalides Between Cis-Tetrakis(Methoxy)Tungsten(VI) Dihalides and Organosilanes. F. E. Brinckman, K. L. Jewett, National Bureau of Standards; L. B. Handy, U of Arkansas, U.S.A. 9:45—189. Copper- and Silver-Promoted Reactions of Aromatic Nitro Compounds. M. Nilsson, J. Chodowska-Palicka, C. Moberg, 0. Wennerstrom, Royal Inst, of Technology, Sweden. 10:00—190. Branched to Normal Alkyl Group Isomerization in Alkyliridium(lll) Complexes. M. A. Bennett, R. Charles, Australian National U, Australia. 10:15—191. The Effect of Solvent and Pressure on the Rates of Oxidative Addition Reactions of lrCI(CO)(P(Ph)3)2. H. Kelm, H. Steiger, U of Frankfurt, West Germany.

Publication Only 192.—Complexes of I r o n / I l l / and Ruthen i u m / I l l / with Some Esters of Phosphonous Acids and a-Aminophosphinic Acids. B. Jezowska-Trzebiatowska, H. Ratajczak, P. Sobota, U of Wroclaw, Poland. 193.—Heptafulvalenedichromium Hexacarbonyl. R. C. Kerber, M. C. Wolf, State U of New York, U.S.A. 194.—Organometallic Ylid Complexes: The Reaction of Hexaphenylcarbodiphosphorane with Group VI Transition Metal Carbonyl. W. C. Kaska, D. K. Mitchell, U of California, U.S.A. 195.—Cis- and Trans-Di(Organometalphosphine)-Substituted Transition Metal Complexes. H. Schumann, J. Kuhlmey, Technische U of Berlin, West Germany. 196.—Stereochemistry and Lability of Dioxobis (2,4-Pentanedionate) Molybdenum^!). W. B. Wise, B. M. Craven, K. C. Ramey, J. G. Zajacek, ARCO Chemical Co., U.S.A. JUNE 7, 1971 C&EN

63

197.—Fragmentation Patterns and Appear­ ance Potentials for Certain Fragments of Substituted Ferrocenes. D. W. Slocum, C. A. Jennings, C. R. Ernst, W. A. Jones, Southern Illinois U, U.S.A. 198.—Five-Covalent Copper (II) Complexes of the Type [Cu(chelate)2B]2+ [chelate = 1,10-phenanthroline (phen),2,2'-bipyridyl (bipy), di(2-pyridyl)2 sulfide (dps) and Β = pyridine, 4-methyl-pyridine and imidazole (Him)]. M. E. Bridson, W. R. Walker, Duquesne U, U.S.A. 199.—Exchange of Aryl Ligands to Poly­ valent Iodine. F. M. Beringer, L. L. Chang, Polytechnic Inst, of Brooklyn, U.S.A. 200.—Stereochemistry of Cyclic Amine Boranes. R. E. Lyle, J. J. Kaminski, E. W. Southwick, U of New Hampshire, U.S.A. 201.—Structure and Reactions of Grignard and Like Compounds from a-Allenic Bromides and Their Rearranged 2-Bromo 1.3-Dienes. C. Troyanowsky, E. Michel, J. Raffi, Ecole de Physique et Chimie de Paris, France. 202.—Synthesis and Reactions of (2-Organo-l,3,2-Dihetero)-Phospholanes, -Phosphorinanes, and -Arsolanes. M. Weiber, W. R. Hoos, J. Goeth, B. Eichhorn, U of Wurzburg, West Germany.

WEDNESDAY MORNING Sheraton-Boston Hotel Gardner Room (Third Floor)

Oral Presentation O-C-3 Enzymes, Nucleic Acids, and Other Biopolymers Presiding Officer: U of Tokyo, Japan

H. Hayatsu,

10:30—203. Circular Dichroism of LysineRich Histone (f-l):DNA Complexes. Ef­ fect of Salts and Dioxane. A. J. Adler, G. D. Fasman, Brandeis U, U.S.A. 10:45—204. The Spectrophotometry Assay of p-Nitrophenyl Ester Hydrolysis. H. J. Goren, U of Calgary, Canada; M. Fridkin, Massachusetts Inst, of Technology, U.S.A. 11:00—205. A Structural Study of Some Transfer RNAs by Laser Raman Spec­ troscopy. P. R. Carey, H. J. Bernstein, National Research Council of Canada. 11:15—206. Role of Metal in the Struc­ ture and Activity of L-Rhamnulose 1-P Aldolase. D. S. Feingold, Ν. Β. Schwartz, U of Pittsburgh, U.S.A. 11:30—207. Synthesis of Ribooligonucleotides on a Polymer Support. M. Ikehara, E. Ohtsuka, S. Morioka, Osaka U, Japan. 11:45—208. Regulation of Enzymatic Re­ actions by Means of Light. Applica­ tion of the Flash-Method for Studying Kinetics and Mechanism of Rapid Re­ action Stages. I. V. Berezin, S. D. Varfolomeev, K. Martinek, Lomonosov State U, U.S.S.R.

Publication Only 209.—Synthesis of Aminoethyl Derivatives of α,ω-Alkylenediamines and StructureActivity Relationships for the Polyamine-Bovine PJasma Amine Oxidase Sys­ tem. M. Israel, E. J. Modest, Children's Cancer Research Foundation, U.S.A. 210.—Interaction of Synthetic Arginine Peptides with DNA. R. L Novak, DePaul U, U.S.A. 21f.—A New Polymer-Support. Method for the Synthesis of Ribooligonucleotide. K. C. Tsou, K. F. Yip, U of Pennsylvania, U.S.A. 212.—Synthesis of Oligodeoxyribonucleotides via S-Ethyl Phosphorothioates. A. F. Cook, M. J. Holmn, D. T. Maichuk, A. L. Nussbaum, Hoffmann-LaRoche, Inc., U.S.A. 213.—Reaction of Bisulfite with Ν6-(Δ2lsopentenyl)Adenosine. H. Hayatsu, Y. Wataya, Y. Furuichi, U of Tokyo; Y. Kawazoe, National Cancer Center Re­ search Inst., Japan. 214.—The Use of Thermo-Analytical Meth­ ods for the Study of Proteins. J. S. Crighton, W. M. Findon, U of Bradford, England. 215.—Dual Purpose Reagents for Mass Spectrometry of Peptides. R. A. Day, H. Falter, J. P. Lehman, U of Cincinnati, U.S.A. 216.—The Use of Mass Spectrometry in the Structural Elucidation of Biologically Important Oligopeptides. D. M. Desiderio, Baylor College of Medicine, U.S.A. 217.—Anion Inhibition of Dipeptide Hy­ drolysis. Effect on Zinc Dipeptidase and Copper Complex Systems. S. K. Mukhopadhyay, D. Armstrong, B. J. Campbell, U of Missouri, U.S.A. 64

C&EN JUNE 7, 1971

218.—The Nature of pH-Discriminant Dif­ ferences in the Modes of Behavior of Various Phosphate Compounds as Sub­ strates and as Inhibitors with Multi­ functional Microsomal Glucose 6-Phosphatase-Phosphotransferase. R. C. Nordlie, J. D. Lueck, T. L. Hanson, P. T. Johns, U of North Dakota Medical School, U.S.A. 219.—On the Structure of the Carbohydrate Chains of Blood-Group Substances. N. K. Kochetkov, V. A. Derevitskaya, Acad­ emy of Sciences, U.S.S.R. 220.—Inhibition of Chymotrypsin by 2Phenylethaneboronic Acid. A Potential Transition-State Analog. G. E. Lienhard, K. A. Koehler, Harvard U, U.S.A.

240.—The External Heavy-Atom Effect on the Photoisomerization of a Cyanine Dye. W. Cooper, K. A. Rome, Eastman Kodak Co., U.S.A. 241.—Photolysis of Trans, Trans- 1, 3, Dinitro-2,4-Diphenylbutadiene. D. B. Mil­ ler, Stanford Research Inst., U.S.A. 242.—Photochemistry of Isoxazole. H. Hiraoka, IBM, U.S.A. 243.—Photohydrolysis of Some Halopyridines. G. H. D. van der Stegen, J. Cornelisse, U of Leyden, the Nether­ lands.

THURSDAY MORNING WEDNESDAY AFTERNOON Sheraton-Boston Hotel Gardner Room (Third Floor)

Oral Presentation O-C-10 Photochemistry Presiding Officer: G. M. J. Schmidt, Weizmann Inst, of Sci­ ence, Israel 2:00—221. Thermal and Photochemical Ap­ proaches to Isobenzofuran. J. B. Bremner, Y. Hwa, U of Tasmania, Australia. 2:15—222. Photochemical and Thermal Rearrangements of N-Methyl-2-CyanoPyrrole. H. Hiraoka, J. Picone, IBM, U.S.A. 2:30—223. Photodimerization of s-Triazolo [4,3-a]Pyridines. K. T. Potts, E. Brugel, Rensselaer Polytechnic Inst., U.S.A. 2:45—224. Mechanism of the Photochemi­ cal Substitution Reactions of Pyridine, Quinoline, and Isoquinoline in Neutral Solution. A. Lablache-Combier, S. Caplain, A. Castellano, J. P. Catteau, U des Sciences et Techniques, Villeneuve d'ASCQ, France. 3:00—225. Solid State Photodimerization. A Method to "Engineer" Molecular Crystal Packing. B. S. Green, G. M. J. Schmidt, Weizmann Inst, of Science, Israel. 3:15—226. Photochemistry of Nonconjugated Bichromophoric Systems: N,N' Alkylene Bis-Maleimides and Polymethylene Bis (7-Oxycoumarines). F. C. De Schryer, J. Put, L. Leenders, U of Leuven, Belgium. 3:30—227. Detection and Kinetics of Re­ active Intermediates in Photolysis of Aqueous Solutions. I. Kraljic, Lab. de Physico-Chimie des Rayonnements, France. 3:45—228. Photohydrolysis of Mesityl pCyanobenzoate: A Mechanistic Study. J. G. Pacifici, J. S. Zannucci, G. R. Lappin, J. C. Ownby, C. A. Kelly, Ten­ nessee Eastman Co., U.S.A. 4:00—229. Quantum Yields of Photoreactions of Pyro- and Isopyrocalciferol. J. Lugtenburg, A. M. Bloothoofd-Kruisbeek, E. Havinga, U of Leyden, the Nether­ lands. 4:15—230. Mechanistic Studies of the Intramolecular Oxetane Synthesis. R. R. Sauers, A. Rousseau, B. Byrne, Rut­ gers U, U.S.A. 4:30—231. Ketone Photochemistry. An Authentic π-π* Type II Photorearrangement and a New Quenching Mechanism for Ketone Triplet States. 0. D. DeBoer, W. G. Herkstroeter, A. P. Marchetti, A. G. Shultz, R. H. Schlessinger, Eastman Kodak Co.., U.S.A. 4:45—232. The Chemiluminescence from Cis-Diethoxydioxetane. A. P. Schaap, Wayne State U; T. Wilson, Harvard U, U.S.A.

Publication Only 233.—The Steric Course of 1-EthyluraciI Photohydration. J. G. Burr, C. Enwall, U of Oklahoma, U.S.A. 234.—Photochemical Reactions of Cytosine Nucleosides in Frozen Aqueous Solution and in DNA. A. J. Varghese, U of Texas, U.S.A. 235.—The Tiplet and the Ketyl Radical of Perfluorobenzophenone. A. Singh, M. G. Jonasson, F. C. Sopchyshyn, F. P. Sar­ gent, Atomic Energy of Canada Ltd., Canada. 236.—Reaction of Chemical Acceptors with Singlet Oxygen Produced by Direct Laser Excitation. I. B. C. Matheson, J. Lee, U of Georgia, U.S.A. 237.—A Flashphotolytic Investigation of the Nucleophilic Photosubstitution of 3,5-Dinitroanisole. G. P. de Gunst, J. Cornelisse, E. Havinga. U of Leyden, the Netherlands. 238.—Photochemistry of Dihydromayurone: Novel Solvent Participation in a Photoisomerization. G. W. Shaffer, Givaudan Corp., U.S.A. 239.—The Mechanism of Photoenolization: o-Methylvalerophenone. W. R. Bergmark, B. Beckmann, W. Lindenberger, Ithaca College, U.S.A.

Sheraton-Boston Hotel Gardner Room (Third Floor)

Oral Presentation O-C-7

Ionic Processes

Presiding Officer: A. Fredga, Chemical Inst, of Uppsala, Swe­ den 9:00—244. I ntermediacy of the Ethyl Cation in the C2H5F-SDF5 System. J. R. DeMember, R. H. Schlosberg, G. A. Olah, Case Western Reserve U, U.S.A. 9:15—245. Reactions of Ethoxytropenylium Fluoroborate with Amines. T. Fukunaga, E. I. du Pont de Nemours & Co., U.S.A. 9:30—246. Molecular Rearrangement of aPinene. R. Muneyuki, Y. Yoshimura, K. Tori, Shiongi & Co., Ltd., Japan. 9:45—247. Relative Stabilities of Thiirenium Ions Intermediates in the Solvolysis of Thiovinyl Sulfonates. G. Modena, U. Tonellato, U of Padua, Italy. 10:00—248. Vinylic Displacement Reac­ tions, Conformation in the Transition State. A. Winston, R. N. Kemper, West Virginia U, U.S.A. 10:15—249. Reactions of Bicyclic Cyclooctatrienes with Alkali Metal Amides in Liquid Ammonia. S. W. Staley, G. M. Cramer, U of Maryland, U.S.A. 10:30—250. Kinetic Evidence for Carbanion Intermediates in Dehydrohalogenation Reactions of Highly Halogenated Phenylakanes. H. F. Koch, A. G. Toczko, Ithaca College, U.S.A. 10:45—251. Kinetics of the Reaction of 1,3-Dinitrobenzene with Methoxide Ion in Methanol Solution. I. R. Bellobono, A. Gamba, G. Sala, M. Tampieri, U of Milan, Italy.

Publication Only 252.—Correlation of Catalytic Coefficients and Isotope Effects on Diazoacetate Hy­ drolysis by Marcus' Theory. S. Oh, M. M. Kreevoy, U of Minnesota, U.S.A. 253.—Investigations into Reaction Mech­ anisms of Peroxyacids Toward Diazoalkanes. R. Curci, F. DiFuria, F. Marcuzzi, U of Padua, Italy. 254.—Stereochemical and Steric Effects in Nucleophilic Substitution of Alpha Haloketones. J. Warkentin, J. W. Thorpe, McMaster U, Canada. 255.—Two New Rearrangements of Cyclobutenyl Cations. V. A. Koptyug, I. S. Isaev, I. A. Shleider, Academy of Sci­ ences, U.S.S.R. 256.—Substitution Reactions of 1-Bromocyclobutane-1-Carboxylic Acid and Its Ethyl Ester. A. Fredga, U of Uppsala, Sweden. 257.—Rearrangement Reactions of 1-Substituted-Benzobarrelenes. H. Heaney, S. V. Ley, Loughborough U of Technology, England. 258.—Pinacol-Type Rearrangements in the Phenylcyclohexane Series: Evidence for Differences Between the Reaction Mech­ anisms of Epoxides and of the Cor­ responding Diols and Halohydrins. B. Macchia, G. Berti, F. Macchia, L. Monti, U of Pisa, Italy. 259.—The Addition of 2,4-Dinitrobenzenesulfenyl Chloride to Norbornadiene: The Absence of Stereochemical Results Di­ rected by a Bridged Sulfonium Ion. T. C. Morrill, N. D. Saraceno, Rochester Inst, of Technology, U.S.A. 260.—A Comparative Study of the Reactiv­ ity of Benzopyrylium and Anthracenium Salts Toward Hydrid Transfer or the Ac­ tion of Weak Nucleophiles. D. Molho, B. Bodo, J. Andrieux, Museum National d'Histoire Naturelle, France. 261.—An NMR Study of Solvation Shells of Diamagentic Cations in Aqueous Mixtures of Organophosphorus Solvents. J.-J. Delpuech, M. R. Khaddar, A. Péguy, U of Nancy, France. 262.—Deprotonation Rates of 4-Substituted Pyridinium Salts in Strongly Acidic Aqueous Solutions. J.-J. Delpuech, G. Serratrice, U of Nancy, France. 263.—Reductive Angular Alkylation of Polycyclic Hydrocarbons. R. G. Harvey, D. F. Lindow, U of Chicago, U.S.A.

264.—The Effect of Solvent Variation on the Sedimentation Behavior of Sodio Diethyl N-Butylmalonate. G. H. Barlow, H. E. Zaugg, Abbott Labs., U.S.A. 265.—Ion-Pair Processes in the Alkylation of Enolates. H. E. Zaugg, J. E. Leonard, Abbott Labs., U.S.A. 266.—Meisenheimer Complexes in Heteroaromatic Substrates: Kinetic Study of the Interaction of 3,5-Dinitro-4-Methoxy Pyridine with Methoxide Ion in Methanol and the Mixtures CH.5OH-DMSO. F. Terrier, R. Schaal, A. P. Chatrousee, E.N.S.C.P., France. 267.—The Transient 1,3-Methoxide Ion Adduct of 2,4,6-Trinitroanisole in Methanol. C. F. Bernasconi, U of California, U.S.A. 268.—P-Biphenylyl Migration During Reaction of l-Chloro-2-P-Biphenylylethane and 4-Chloro-l-P-Biphenylyl-l,l-Diphenylbutane with Alkali Metals. E. Grovenstein, Jr., J.-U. Rhee, Georgia Inst, of Technology; Y.-M. Cheng, West Point Pepperell Research Center, U.S.A. 269.—Pyridinium Methylides. J. A. Zoltewicz, P. E. Kandetzki, U of Florida, U.S.A. 270.—Base-Catalysed Rearrangements in Reissert Compound Chemistry. B. C. Uff, S. L. Tan, G. W. Kirby, Loughborough U of Technology, England. 271.—Evaluation of Electron-Attachment Efficiencies of Organic Solutes in Solid Hydrocarbon Matrices by the Technique of "Stimulation Spectra." F. Kieffer, A. Déroulede, C. Meyer, J. Rigaut, Lab. de Physico-Chimie des Rayonnements, Orsay, France. 272.—Alkylation of Benzene with Cyclopropane. I. Partchamazad, M. Khosrovi, N. Sadeghi, Teheran U, Iran.

THURSDAY MORNING Sheraton-Boston Hotel Gardner Room (Third Floor)

Oral Presentation O-C-2 Applications of Theory and Quantum Mechanics Presiding Officer: L. Paoloni, U of Palermo, Italy 11:00—273. Geometries and Energies of C.iHn + Cations. L. Radom, J. A. Pople, Carnegie-Mellon U; P. V. R. Schleyer, Princeton U, U.S.A. 11:15—274. Evaluation of Excited State Potential Functions and Vibronic Transition Intensities of Conjugated Molecules. A. Warshel, M. Karplus, Harvard U, U.S.A. 11:30—275. The Electrostatic Molecular Potential as a Useful Tool for the Interpretation of some Molecular Properties. E. Scrocco, G. Alagona, R. Bonaccorsi, R. Cimiraglia, J. Tomasi, Lab. di Chimica Quantistica, Italy. 11:45—276. Theoretical Study of the Thermal Decomposition of 2,3-Diazabicyclo (2.2.1)hept-2-ene and Additions to Bicyclo(2.1.0)pentane, by Multiconfigurational Mapping and MO Methods. C. Trindle, F. S. Collins, J. K. George, U of Virginia, U.S.A.

Publication Only 277.—Ab Initio Calculations on Large Molecules Using Molecular Fragments. First Order Electronic Properties. R. E. Christoffersen, G. M. Maggiora, D. W. Genson, B. V. Cheney, U of Kansas, U.S.A. 278.—Competition of One Electron Versus Two Electron Contributions in Determining Potential Energy Surfaces. W. D. Hobey, W. J. McC. Dolbow, Worcester Polytechnic Inst., U.S.A. 279.—Electronic Structure of the OxoTautomers of Hydroxy-Aza-Benzenes. L. Paoloni, M. Cignitti, G. La Manna, M. L. Tosato, L. Soccorsi, U of Palermo, Italy. 280.—The Electronic Structure of the Open Forms of Three-Membered Rings. E. F. Hayes, A. K. Q. Siu, Rice U, U.S.A. 281.—Molecular Orbital Studies of Reaction Paths. K. Morokuma, U of Rochester, U.S.A. 282.—Electronic Structures of Bicyclobutane and Tricyclo[l.l.l.0 1 « 3 ]Pentane. J. M. Schulman, Polytechnic Inst, of Brooklyn; M. B. Newton, Brookhaven National Lab, U.S.A. 283.—CNDO Calculations on the Imides of Sulfur Dioxide. J. R. Grunwell, W. C. Danison, Jr., Miami U, U.S.A. 284.—The Use of a "Delocalized Model" for the Representation of Intermediate Complexes Appearing in Substitution Reactions of Conjugated Molecules. 0. Chalvet, Centre de Mécanique Ondulatoire Appliques, France.

THURSDAY AFTERNOON Sheraton-Boston Hotel Gardner Room (Third Floor)

Oral Presentation O-C-8 Radicals, Carbenes, and Other Short-Lived Inter­ mediates Presiding Officer: Ο. Μ. Nefedov, Academy of Sciences, U.S.S.R. 2:00—285. ESR Spectra of the 1-Adamantyl and Related Bridgehead Radicals. T. A. Rettig, P. K. Krusic, E. I. duPont de Nemours & Co.; P. v. R. Schleyer, Princeton U, U.S.A. 2:15—286. Endor Studies of Organic Radi­ cals in Liquid Crystals. K. Mobius, K. P. Dinse, R. Biehl, H. Haustein, Free U of Berlin, West Germany. 2:30—287. Application of "F-Chemically Induced Dynamic Nuclear Polarization to Reaction Mechanism Studies. The Mech­ anism of Alkyl Halide-Alkyl Lithium Re­ actions. J. W. Rakshys, Jr., Dow Chemi­ cal Co., U.S.A. 2:45—288. Chronology of the Addition of 1-Cyano-l-Methylethyl Radicals to Multi­ ple Bonds Studied by NMR Spectroscopy. H. Iwamura, M. Iwamura, T. Nishida, U of Tokyo, Japan. 3:00—289. The Reaction of Cyclic Ethers with Electrophilic Unsaturated Sub­ strates. G. Ahlgren, Royal Inst, of Technology, Sweden. 3:15—290. Generation of Radicals from Sulfoxides with Fenton's Reagent. A New Radical Alkylation Method. K. Torssell, B. M. Bertilsson, J. Kiihn, B. Gustafsson, U. Rudqvist, U of Aarhus, Denmark. 3:30—291. N,N,N',N'-Tetramethyl-p-Phenylenediamine as Catalyst for the Autoxidation of 1,4-Dihydronicotinamides and Its Derivatives. G. Cilento, E. J. H. Bechara, U of Sao Paulo, Brazil. 3:45—292. Photochlorination as a Tool for the Study of Structure-Reactivity Re­ lationships in Free Radical Formation. A. Bruylants, J. Ph. Soumillion, P. Gouverneur, Th. Burton, Lab. de Chimie Générale et Organique de Louvain, Belgium. 4:00—293. The Free Radical Bromination of Byclohexyl Bromide and 1-Bromobutane with N-Bromosuccinimide and Molecular Bromine. D. D. Tanner, M. W. Mosher, N. C. Das, E. V. Blackburn, U of Alberta, Canada. 4:15—294. Phosphene Durch Umlagerung von Phosphinylcarbenen—Eine Neuve Klasse Reaktiver Zwischenstufen. M. Regitz, W. Anschutz, A. Liedhegener, H. Scherer, L. Eckes, U of Saarlandes, West Germany. 4:30—295. The Copper Chelate-Catalyzed Decomposition of o-AIkoxycarbonyl -αDiazoacetophenones: Reactions of a Copper Carbenoid. M. Takebayashi, T. Ibata, K. Ueda, Osaka U, Japan. 4:45—296. A Simple, One-Step, Conversion of Aniline into Benzyne. J. I. G. Cadogan, J. R. Mitchell, J. T. Sharp, U of Edinburgh, Scotland.

Publication Only 297.—Stereochemistry of the Diphenylmethyl Radical. S. A. Liebman, Arm­ strong Cork Co.; D. R. Dalton, Temple U, U.S.A. 298.—Synthesis of Stable Nitroxide Radi­ cals. Determination of Coupling Parame­ ters for ] H , -Ή, 13 C, and 19 F by NMR and ESR Spectroscopy. K. Torssell, J. A. Petersen, U of Aarhus, Denmark. 299.—Spin Pairing in Solid Free Radicals of Biological Relevance. H. J. Keller, K. Maier, D. Nothe, U of Munchen, West Germany. 300.—Pyridinyl Diradical ττ-Mer: Magne­ sium Iodide Complexes. Ε. Μ. Kosower, J. Hajdu, State U of New York, U.S.A. 301.—Investigation of the Pyrolysis of Organomercury Compounds by the Method of Matrix Isolation. R. H. Hauge, J. L. Margrave, Rice Univ, U.S.A.; A. K. Maltsev, R. G. Mikaelian, 0. M. Nefedov, N. D. Zelinsky, Academy of Sciences, U.S.S.R. 302.—The Addition of Dihalocarbenes to 5,6-Unsaturated B-Norsteroids. Applica­ tion of the Woodward-Hoffmann Rule. P. Rosen, R. Karasiewicz, Hoffmann-La Roche, Inc., U.S.A.

303.—Carbenoids with Neighboring Heteroatoms. Electrophylic Reactions of Cer­ tain Stabilized Carbenoids. K. G. Taylor, J. Chaney, M. S. Clark, U of Louisville, U.S.A. 304.—Di-T-Butylvinylidene Carbene, TetraT-Butylbutatriene, Tetra-T-Butylhexapentaene, and Tetrakis (Di-T-Butylvinylidene) Cyclobutane. H. D. Hartzler, E. I. du Pont de Nemours & Co., U.S.A. 305.—Nitrene-lnduced Aromatic Rearrange­ ments. J. I. G. Cadogan, S. Kulik, P. Llm, U of Edinburgh, Scotland. 306.—The Decomposition of Sulfonyl Azides by Iron Carbonyls. R. A. Abramovitch, G. N. Knaus, U of Alabama, U.S.A. 307.—Some Reactions of Azidoazolopyridazines. M. Tisler, B. Stanovnik, U of Ljubljana, Yugoslavia. 308.—Reaction Between 1,3-Dinitrobenzene and l-Ethyl-4-carbomethoxypyridinyl Radi­ cal. M. Mohammad, U of Islamabad, Pakistan; E. M. Kosower, State U of New York, U.S.A. 309.—The Kinetics of the Gas Phase Io­ dine-Catalyzed Isomerization of Methyl Acetylene and the Propargyl Stabilization Energy. R. Walsh, U of Reading, Eng­ land. 310.— On the Free-Radical Nature of Arene Thermolysis. R. Louw, W. Dorrepaal, U of Leyden, the Netherlands. 311.—A Novel Intramolecular Free-Radical Cyclization in the Vapor-Phase Arylation of Methyl Benzoate. A. I. Feinstein, E. K. Fields, Amoco Chemicals Corp., U.S.A. 312.—Propagation of Radiation Damage with Biochemical Radicals. D. R. Kalkwarf, Battelle-Northwest, U.S.A. 313.—Homolytic Oxidative Coupling of Meta-Cresols in Vitro and in Vivo. G. W. Perold, U of the Witwatersrand, South Africa.

FRIDAY MORNING Sheraton-Boston Hotel Gardner Room (Third Floor)

Oral Presentation O-C-5 Determination of Struc­ ture and Conformation Presiding Officer: T. Urbanski, Technical U of Warszawa, Po­ land 9:00—314. Conformational Analysis of N,N,2,6-Tetrasubstituted Anilinium Ions and Related Compounds. A. Mannsçhreck, E. Keck, H. Muensch, U of Heidelberg, West Germany. 9:15—315. Interactions Gauches Entre Groupements t-Butyle et Ethoxycarbonyles Vicinaux en Series Cyclohexanique et Cyclohexanique. J. P. Aycard, H. Bodot, U de Provence, France. 9:30—316. The Circular Dichroism and Conformation of Lignans. P. B. Hulbert Johns Hopkins U; W. Klyne, Westfield College, England. 9:45—317. Allylic Axial Chirality and 7Γ-^7Γ* Transition Region Cotton Effects of Polycyclic Conjugated Dienes and Enones. A. W. Burgstahler, U of Kansas, 10:00—318. Conformations of Steroid Α-Rings Determined by X-Ray Crystallog­ raphy and Spectroscopy. Y. Osawa, W. L. Duax, Medical Foundation of Buffalo U.S.A. 10:15—319. The Crystal and Molecular Structure of the "Anomalous Acetate" of Katonic Acid. A Drastically Twisted Carbon-Carbon Double Bond. W. E. Thiessen, H. A. Levy, Oak Ridge National Lab; W. G. Dauben, D. A. Cox, U of California, U.S.A. 10:30—320. Structures of Unexpected Re­ action Products of Pyridoxal with Cyan­ ide. G. Kartha, H. Ahrens, W. Korytnyk, Roswell Park Memorial Inst., U.S.A. 10:45—321. Determination of Absolute Configuration of an Optically Pure 16IODO-5j8-Pregnane by Circular Dichroism. S. Sarel, Y. Yanuka, J. Dichter, Hebrew U. Israel. 11:00—322. Von Braun Cyanogen Bromide Reaction—A Combined Structural, Ki­ netic, and Synthetic Study. G. Fodor, S. Abidi, R. R. Smith, West Virginia U, 11:15—323. The Stereochemistry of Vinyl Phosphates from the Perkow Reaction and the Phosphorylation of Enolates. I. J. Borowitz, S. Firstenberg, E. W. R. Casper, Yeshiva U, U.S.A. 11:30—324. The Structure of Lipoxamycin, a Novel Antifungal Antibiotic. H. A. Whaley, Upjohn Co., U.S.A. 11:45—325. A Trail Pheromone from Nasutitermes. A. J. Birch, J. Ε. Τ. Corrie, B. P. Moore, Australian National U, Australia.

Publication Only 326.—NMR Studies of Nonchair Conforma­ tions of Cyclohexane Derivatives. R. D. Stolow, J. L. Marini, Tufts U, U.S.A. 327.—Ultrasonic Relaxation Associated with Conformational Equilibria Involving Chair and Twist Boat Forms of 1,3-Dioxans. E. Wyn-Jones, G. Eccleston, U of Salford, England. 328.—Conformation of Some Chain O-Nitro Compounds in CT-Complexes. T. Ur­ banski, B. Hetnarski, W. Poludnikiewicz, Technical U of Warszawa, Poland. 329.—Conformational Analysis of 2-Methylbutane. A Variable-Temperature NMR Study. R. L. Lipnick, E. W. Garbisch, Jr., U of Minnesota, U.S.A. 330.—Novel Polycyclic Heterocycles VII. Synthesis of Tetracyclic Ketones and Derivatives from Tricyclic 5,11-Dihydrodibenz [b,e] [1,4] Oxazepines. R. B. Petigara, H. L. Yale, Squibb Inst, for Medical Research, U.S.A. 331.—Evidence for the Stereostructures of Two Sulfur-Containing Alkaloids, Thionuphlutine-A and -B. R. T. LaLonde, C. F. Wong, College of Forestry, Syra­ cuse U, U.S.A. 332.—Deoxyharringtonine, a New Antitumor Alkaloid from Cephalotaxus: Structure and Synthetic Studies. K. L. Mikolajczak, R. G. Powell, C. R. Smith, Jr., Northern Marketing and Nutrition Re­ search Division, U.S.A. 333.—The Structures of a-, j3- and 7-Perezols. P. Joseph-Nathan, Ma. P. Gonzalez, Inst. Politecnico Nacional, Mexico. 334.—The Structure of New Lignans from Myristica Cagayanensis Merr. Y. T. Lin, Y. H. Kuo, S. T. Kao, National Taiwan U, Republic of China. 335.—Conformation of Valerane. P. N. Rao, Southwest Foundation for Research and Education, U.S.A. 336.—Quantitative Conformational Results in 4- and 5-Fluoromethylated-l,3-Dioxanes. M. J. Anteunis, P. Dirinck, State U of Ghent, Belgium.

FRIDAY AFTERNOON Sheraton-Boston Hotel Gardner Room (Third Floor)

Oral Presentation O-C-11 ics

Special Organic Top­

Presiding Officer: C. Ponnamperuma, NASA, Ames Research Center, U.S.A. 2:00—337. A Computer-Based System for Handling Structural Representations. R. J. Rowlett, Jr., F. A. Tate, Chemical Ab­ stracts Service, U.S.A. 2:30—338. Organic Synthesis in Simulated Jovian Atmosphere. M. S. Chadha, Bhabha Atomic Research Center, India; C. Ponnamperuma, NASA, Ames Research Center, U.S.A. 2:45—339. Investigations on the Biosyn­ thesis of Xanthocillin. H. Achenbach, F. Konig, U of Freiburg, West Germany. 3:00—340. Thermal Chemistry of Pentachlorophenol. H. G. Langer, T. P. Brady. L. A. Dalton, Dow Chemical Co., U.S.A. 315—341. The Conformational Isomeriza­ tion of Ν,Ν'-Dialkyl Piperazinium Dichlorides. J.-J. Delpuech, Y. Martinet, U of Nancy, France. 3:30—341A. New Reactive Intermediates: α-Chloro Enamines and their Keteneiminium Tautomers. L. Ghosez, B. Haveaux, J. Brynaert, T. S. Lin, M. Rens, C. Zamar, U of Louvain, Belgium.

Publication Only 342.—Substituent Effects and Long-Range Couplings in Several )3,/3-Dimethylstyrenes. D. J. Sardella, E. R. Curry, Boston College, U.S.A. 343.—Linear Free Energy Correlations of NMR Chemical Shift Phenomena: A New Method for Quantifying Polar Solute- Aro­ matic Solvent Interactions. A. P. Mar­ chand, W. R. Weimar, Jr., U of Okla­ homa, U.S.A.; A. S. De Angelis, Inst, di Chimica delle Macromolecole del C.N.R. Italy; A. M. Ihrig, Texas Chris­ tian U, U.S.A. 344.—Hybridization on Amine Nitrogens and pKa's of some N-(4-Nitrophenyl) Polymethyleneimines. J. W. Eastes, M. H. Aldridge, American U; R. R. Minesinger, M. J. Kamlet, U.S. Naval Ordnance Lab, U.S.A. 345.—Conformation of Some Organic Scin­ tillators in Lower Si Excited State. J. M. Salmon, P. Viallet, Centre U de Per­ pignan, France.

346.—Properties of the Pyndazine-lodine Semiconductor and Related Species. P. Laszlo, Inst, de Chimie, Sart Tilman, Belgium; R. Dratler, Princeton U, U.S.A. 347.—Isotope Separation with the Continu­ ous Wave Hydrogen Fluoride Laser. S. W. Mayer, M. A. Kwok, R. W. F. Gross, D. J. Spencer, Aerospace Corp., U.S.A. 348.—Solid-State Reaction Kinetics I I I : The Calculation of Rate Constants of Decomposition for a Melting System Undergoing Volume and Surface Area Changes. E. A. Dorko, R. W. Crossley, Air Force Inst, of Technology, U.S.A. 349.—Dithiobiurets and Dithiazolium Salts as Insect Chemosterilants. J. E. Oliver, U. S. Dept. of Agriculture, U.S.A. 350.—The Practical Aspects of Using Some Products of 7-lrradiation of Starch, Agar, and Other Polysaccharides. I. N. Poutilova, K. A. Korotchenko, Food Industry Inst., U.S.S.R.

MACROMOLECULAR CHEMISTRY SYMPOSIA MONDAY AFTERNOON AND TUESDAY MORNING AND AFTERNOON Sheraton-Boston Hotel Independence Rooms Β and Floor)

Symposium M-1 Conformational Macromolecules

C (Second

Dynamics of Change in

Chairman: G. Allen, U of Man­ chester, England Vice Chairman: D. M. Crothers, ers, Yale Univ., U.S.A. 2:00—351. Conformations and Contortions: Introduction to the Symposium. W. H. Stockmayer, Dartmouth College, U.S.A. 3:00—352. Unwinding of DNA. Β. Η. Zimm, U of California, U.S.A. 3:50—353. Theory of Cooperative Kinetics on a Linear Lattice. G. Schwarz, U of Basel, Switzerland. 4:25—354. Theories of Polymer Motion. S. F. Edwards, U of Manchester, England. 9:00—355. Some Recent Developments in Mechanical Techniques for Studying Mo­ lecular Relaxation Processes. J. L. Schrag, J. D. Ferry, U of Wisconsin, U.S.A. 9:45—356. Magnetic Resonance Methods for the Study of Macromolecular Mo­ tion. R. E. Richards, Merton College, England. 10:15—357. Dynamics of Macromolecules: Studied by Neutron Scattering. P. A. Fgelstaff, U of Guelph, Canada. 2:00—358. Measurements of Diffusion Constants from the Spectrum of Light Scattering by Solutions of Macromole­ cules. G. B. Benedek, Massachusetts Inst, of Technology, U.S.A. 2:40—359. Application of Neutron In­ elastic Scattering Studies to the Dy­ namics of Polymer Motion. G. Allen, U of Manchester, England. 3:20—360. Conformation Rate Studies by Light Scattering and Fluorescence from Solution. S. Claesson, U of Uppsala, Sweden. 4:00—361. Friction-Limited DNA Unwind­ ing. H.-CH. Spatz, D. M. Crothers, Max Planck Inst, fur Molekulare Genetik, West Germany. 4:30—362. Thermodynamics and Kinetics of Conformational Changes in tRNA P H E from Yeast. G. Maass, D. Riesner, R. Romer, Gesellschaft fur Molekularbiologische Forschung, West Germany.

TUESDAY MORNING Sheraton-Boston Hotel Independence Rooms Β and C (Third Floor)

Discussion Session A—11 A.M. Discussion Leader: W. H. Stockmayer, Dartmouth College, U.S.A. 363.—Study of the Solution Structure of Biological Macromolecules Using Per­ turbed Angular Correlations of GammaRadiation. A. G. Marshall, U of British Columbia, Canada. 364.—Kinetics of Conformational Transi­ tions. E. Helfand, Bell Telephone Labs, Inc., U.S.A. JUNE 7, 1971 C&EN

65

365.—Light Scattering Off Fluctuations in a Biophysical Conformational Change. E. M. Simon, U of Rochester, U.S.A.

Discussion Session Β—12 Noon 366.—On Non-Newtonian Intrinsic Viscosity of Flexible Coil Macromolecules of Low Molecular Weights. C. Wolff, Faculty of Science, Brest, France. 367.—Frictional Behavior of the Correlated Chain. A. Horta, Inst. Rocasolano, Spain.

MONDAY AFTERNOON AND TUESDAY MORNING AND AFTERNOON John B. Hynes Civic Auditorium Rooms D and Ε (First Floor)

Symposium M-2 Photochem­ istry of Macromolecules Chairman: J. E. Guillet, U of Toronto, Canada Vice Chairman: F. H. Winslow, Bell Telephone Labs, Inc., U.S.A. 2:00—Introductory Remarks. J. E. Guillet. 2:05—368. A Short Survey of Amino Acid and Protein Photochemistry. F. W. J. Teale, U of Birmingham, England. 3:00—369. Paths of Relaxation of Elec­ tronically Excited Nucleic Acids. A. A. Lamola, Bell Telephone Labs., Inc., U.S.A. 4:00—370. Photochemistry of Excited States of Nucleic Acid Components. H. E. Johns, U of Toronto, Canada. 9:00—371. Energy Transfer and Migration in Polymers. G. Geuskens, Free U of Brussels, Belgium. 10:00—372. Photochemistry in Macromolecular Systems. J. E. Guillet, U of Toronto, Canada. 2:00—373. Synthesis and Properties of Photoreactive Polymers. J. L. R. Wil­ liams, Eastman Kodak Co., U.S.A. 3:00—374. Photosensitized Degradation and Photosensitized Oxidative Degrada­ tion of Polymers in Solution. J. F. Rabek, Technical U of Wroclaw, Poland.

TUESDAY MORNING John B. Hynes Civic Auditorium Room F (First Floor)

Discussion Session A—11 A.M. Discussion Leader: R. B. Fox, Naval Research Lab., U.S.A. 375.—Photostabilization of Polypropylene by Energy Quenching. D. J. Carlsson, D. M. Wiles, National Research Council of Canada. 376.—Photolysis of Poly(p-methylstyrene). N. A. Weir, Lakehead U, Canada.

Discussion Session Β—12 Noon 377.—The Interaction of a Photoisomerizable Dye with Polymers. G. van der Veen, W. Prins, Syracuse U, U.S.A. 378.—Photopolymerization of Nonconjugated Bichromophoric Substances. F. C. De Schryver, G. Smets, U of Louvain, Belgium. 379. Photochemical Degradation of Poly (Ethylene Terphthalate). M. Day, D. M. Wiles, National Research Council of Canada. 380.—The Role of Excimers in Polymer Photoprocesses. R. B. Fox, T. R. Price, J. R. McDonald, R. F. Cozzens, Naval Research Lab, U.S.A.

MONDAY AFTERNOON AND TUESDAY MORNING AND AFTERNOON Sheraton-Boston Hotel Commonwealth Room (Third Floor)

Symposium M-3 New Devel­ opments in Ionic Polymeriza­ tion Chairman: D. C. Pepper, U of Dublin, Trinity College, Ireland Vice Chairman: J. Boor, Jr., Shell Chemical Co., U.S.A. 2:00—381. Fast-Initiated Cationic Poly­ merizations. D. C. Pepper, U of Dublin, Trinity College, Ireland. 3:00—382. Novel Graft Copolymers by Carbonium Ion Mechanism. J. P. Ken­ nedy, U of Akron, U.S.A. 66

C&EN JUNE 7, 1971

4:00—383. Cation Radicals in Olefin Re­ actions. A. Ledwith, U of Liverpool, England. 9:00—384. Mechanism of Ziegler-Type Catalyses. J. Boor, Jr., Shell Chemical Co., U.S.A. 10:00—385. Mechanism of Organolithium Polymerization of Diolefins. M. M. Morton, U of Akron, U.S.A. 2:00—386. Recent Developments on the Ring Opening Polymerization of Episulfides and Epoxides. E. J. Vandenberg, Hercules Inc., U.S.A. 2:45—387. 7r-Allyl Polymerization of Di­ olefins. Ph. Teyssie, U of Liege, Bel­ gium. 3:30—388. Syndiotactic Polypropylene. A. Zambelli, Inst, di Chimica delle Macromolecole del C.N.R., Italy. 4:15—389. Polymerization of Polar Mono­ mers with Ziegler-Natta Catalyst Sys­ tems. S. L. Kapur, National Chemical Lab, India.

WEDNESDAY MORNING John B. Hynes Civic Auditorium Room F (First Floor)

Discussion Session A—11 A.M. Discussion Leader: M. G. Broadhurst, National Bureau of Standards, U.S.A.

TUESDAY MORNING Sheraton-Boston Hotel Jefferson Room (Third Floor)

Discussion Session A—11 A.M. Discussion Leader: J. Kennedy, U of Akron, U.S.A.

1:30—401. Raman Scattering from Biological Polymers. W. L. Peticolas, U of Oregon, U.S.A. 2:20—402. Rheo-Optics of Polymer Gels. W. Prins, Syracuse U, U.S.A. 3:10—403. Optical Properties of Bulk Polymers. R. S. Stein, U of Massachusetts, U.S.A. 4:00—404. Fluorescence Time Decay Studies of Macromolecules. I. Isenberg, R. Schuyler, Oregon State U, U.S.A.

P.

390.—Stereospecific Polymerization of Methyl α-Phenylacrylate. K. Hatada, H. Yuki, T. Niinomi, M. Hashimoto, J. Ohshima, Osaka U, Japan. 391.—Anionic Polymerization of Methacrylic Esters. I I . Stereoregularity. J. Junquera, N. Cardona, J. E. Figueruelo, Ciudad U and Inst. Rocasolano, Spain. 392.—The Reaction of Butyl lithium with 1,3 Pentadienes in Hydrocarbon Sol­ vents: Structure and Composition of Oligomeric Products—The Structure of Oligomeric Poly-2 Methyl-1,3 Pentadienyllithium. A. Ulrich-Geraudelle, F. Schué, J. Cressely, A. Deluzarche, A. Maillard, C. Taniélian, Inst, de Chimie de Strasbourg, France. 393.—Polymerization and Copolymerization of Cis and Trans 1,3-Pentadienes Initiated by Rhodium Trichloride, Rhodium Nitrate, and Ammonium Hexachlororhodate in Aqueous Emulsion. A. A. Entezami, F. Schué, A. Deluzarche, A. Maillard, C. Taniélian, R. Mechin, Inst, de Chimie de Strasbourg, France. 394.—Initiation and Termination Steps in Butadiene Polymerization by Rhodium Catalysts. J. Zachoval, F. Mikes, J. Krepelka, Technical U of Prague, Czechoslovakia.

Discussion Session Β—12 Noon 395.—Cationic Polymerization and Copoly­ merization of Methoxylated Monomers. J. P. Tortai, M. Mayen, E. Maréchal, Inst. National Supérieur de Chimie Industrielle de Rouen, France. 396.—The Kinetics and Mechanism of Cationic Polymerization of 1,3-Dioxolan Initiated by Triphenylmethyl Salts. A. Stolarczyk, Kubisa, S. Syomkowski, S. Penczek, Academy of Sciences, Poland. 397.—Polymerization of Ethylene with Soluble Ziegler-Natta Catalysts. H. Hocker, K. Saeki, W. Kern, U of Mainz, West Germany. 398.—A Study of Chain Growth Reaction in Cationic Lactam Polymerization. Z. Csuros, I. Rasznak, Gy. Bertalan, J. Korosi, Polytechnical U of Budapest, Hungary.

WEDNESDAY MORNING AND AFTERNOON John B. Hynes Civic Auditorium Rooms D and Ε (First Floor)

Symposium M-4 Electrical and Optical Properties of Poly­ mers Chairman: H. C. Benoit, Centre de Recherche sur Les Macro­ molecules de Strasbourg, France Wee Chairman: I. Tinoco, U of California, U.S.A. 9:00—399. Kerr Effect of Biological Mac­ romolecules. M. Hanss, J. C. Bernengo, B. Roux, Lab. de Chimie Macromoleculaire et de Biochmie de la Faculté des Sciences de Lyon, France. 10:00—400. Electrical Properties of Polymers in Bulk. M. Kryszewski, Academy of Sciences, Poland.

405.—Dielectric Relaxation of Molecules Oriented in an Electric Field. R. Ullman, Ford Motor Co., U.S.A. 406.—Dielectric and Piezoelectric Properties of Polymer Composites. H. Nakamura, T. Kitayama, T. Shiramatsu, Electrical Communication Lab., Japan. 407.—Electro-optic Information on Control of Structure in the Bacteriophage fl. J. B. Milstien, National Inst, of Health; E. F. Rossomando, Brandeis U, U.S.A. 408.—Electric Dichroism of DNA in Solution. E. Charney, National Inst, of Health, U.S.A.; K. Yamaoka, Hiroshima U, Japan. 409.—Effect of Orientation on Electrical Properties of Polymers. M. A. Bagirov, S. A. Abasov, V. P. Malin, Academy of Sciences, U.S.S.R.

Discussion Session Β—12 Noon 410.—The Binding of Proflavine to Polyglutamic Acid as Studied by the Disper­ sion of the Kerr Constant. J. C. Powers, Jr., Pace College; F. Jumayan, Hunter College, City U of New York, U.S.A. 411.—Interference Effects in Anisotropic Light Scattering by Concentric Spherulite Disks. A. Gourdenne, R. H. Marchessault, U of Montréal, Canada. 412.—Comparative Studies of Solvation of Polyvinylpyrrolidone in Polar Solvents Mixtures, by Light Scattering and Infrared Spectroscopy. B. Chaufer, C. Sistel, B. Sebille, C. Quivoron, U of Paris, France. 413.—On the Application of the Three Constant Equation for the Temperature Dependence of Electrical Conductivity of Organic Semiconducting Polymers. M. Kryszewski, S. Sapieha, Academy of Sciences, Poland. 414.—Electrode Reactions of RNAse Adsorbed on a Mercury Electrode. I. R. Miller, O. Pavlovic, J. Teva, Weizmann Inst, of Science, Israel.

WEDNESDAY MORNING John B. Hynes Civic Auditorium Room F (First Floor)

Discussion Session A—11 A.M. Discussion Leader: S. Lifson, Weizmann Inst, of Science, Israel 420.—ESR Investigation of the Free Radical Initiator System, t-Butyl Hydroperoxide + Sulfur Dioxide. B. D. Flockhart, K. J. Ivin, R. C. Pink, B. D. Sharma, Queen's U of Belfast, Northern Ireland. 421.—Vinyl Polymerization Initiated by Oligoamide and Curpic Ion System. K. Takemoto, T. Takata, Y. Inaki, Osaka U, Japan. 422.—New Aspects Concerning Termination and Transfer of Polymerization of Styrène. K. C. Berger, G. Meyerhoff, U of Mainz, West Germany. 423.—Transfer Effect of Solvent Mixtures on the Propagating Polymethyl Methacrylate and Cumyloxy Radicals. R. Rado, M. Lazâr, E. Borsig, J. Pavlinec, Academy of Sciences, Czechoslovakia. 424.—Polymerization of Monolayers. VI. Influence of the Nature of the Exchangeable Ion on the Tacticity of Insertion PolyCMethyl Methacrylate). A. Blumstein, K. K. Parikh, S. L. Malhotra, R. Blumstein, Lowell Technological Inst., U.S.A. 425.—Electron Donor Acceptor Complexes in the Copolymerization of Maleic Anhydride with Isomeric Butyl Vinyl Ethers. M. L. Hallensleben, U of Freiburg, West Germany.

Discussion Session Β—12 Noon 426.—Copolymerization of Maleic Anhy­ dride and Thiophene. A. Cardon, E. J. Goethals, U of Ghent, Belgium. 427.—Stereochemistry of Alternating Isobutene/Maleic Anhydride, Isobutene/Dimethyl Fumarate, and Isobutene/Dimethyl Maleate Copolymers. R. Bacskai, L. P. Lindeman, D. L. Rabenstein, Chevron Re­ search Co., U.S.A. 428.—Special Forms of Copolymer Compo­ sition Equations. C. W. Pyun, Lowell Technological Inst., U.S.A. 429.—Novel Antepenultimate Copolymer Composition Equation. G. E. Ham, CibaGeigy Corp., U.S.A. 430.—Graft-Copolymerization of Gaseous Methyl Methacrylate on ^-Irradiated Polyethylene. P. Correia, M. H. Bandeira, H. Hovais, Lab. de Fisica e Engenharia Nucleares, Portugal. 431.—On the Free Radical Cyclopolymerization of Divinylether. M. Guaita, G. Camino, L. Trossarelli, U of Torino, Italy.

WEDNESDAY MORNING AND AFTERNOON WEDNESDAY MORNING AND AFTERNOON

Sheraton-Boston Hotel Independence Rooms Floor)

Sheraton-Boston Hotel Commonwealth Room (Third Floor)

Symposium M-6 Membranes —Structure and Transport

Symposium M-5 New Developments in Free Radical Polymerization

Chairman: E. Racker, Cornell U, U.S.A. Wee Chairman: L. L. M. van Deenen, State U of Utrecht, the Netherlands

Chairman: V. A. Kabanov, Moscow State U, U.S.S.R. Wee Chairman: C. Walling, U of Utah, U.S.A. 9:00—415. Role of Matries in Polymerization of Comonomer Charge Transfer Complexes. N. G. Gaylord, Gaylord Research Inst., U.S.A. 10:00—416. New Developments in Kinetics and Synthesis in Free-Radical Polymerization. C. H. Bamford, U of Liverpool, England. 2:00—417. Alternating Copolymerization via Complexed Vinyl Monomers. M. Hirooka, Sumitomo Chemical Co., Ltd., Japan. 3:00—418. Some Problems of Complexation in Radical Polymerization. F. Tudos, Academy of Sciences, Hungary. 4:00—419. Polymerization and Copolymerization in the Presence of Complexing Agents. V. P. Zubov, Moscow State U, U.S.S.R.

Β and C (Second

9:00—Introductory Remarks. E. Racker. 9:05—432. Physical Chemical Properties of Membranes. M. Eigen, Max Planck Inst., West Germany. 9:45—433. Electrical Excitability in Lipid Membranes. P. Mueller, D. O. Rudin, Eastern Pennsylvania Psychiatric Inst., U.S.A. 10:25—434. Role of Phospholipids in Membranes. L. L. M. van Deenen, U of Utrecht, the Netherlands. 2:00—Introductory Remarks. L. L. M. van Deenen. 2:05—435. Reconstitution of a Membrane. E. Racker, Cornell U, U.S.A. 2:45—436. Membrane Transport in Bac­ terial Systems. E. P. Kennedy, Harvard Medical School, U.S.A. 3:25—437. Interaction of Synthetic and Biopolymers with Cell Membranes. E. Katchalski, Weizmann Inst, of Science, Israel.

WEDNESDAY MORNING Sheraton-Boston Hotel Independence Rooms Β and Floor)

C (Second

Discussion Session 11:45 A.M. Discussion Leader: E. Racker, Cornell U, U.S.A. 438.—Diffusion Control of Stress Relaxa­ tion in Membranes. S. Kapur, C. E. Rogers, Case Western Reserve U, U.S.A. 439.—On the Phospholipid-Cholesterol In­ teraction: The Binding of Filipin to Model Membranes. R. Bittman, Β. Κ. Reedy, Queens College, City U of New York, U.S.A.

WEDNESDAY MORNING AND AFTERNOON

9:00—453. Thermodynamic and Morpho­ logical Parameters in Triblock Polymers. D. Mclntyre, U of Akron, U.S.A. 10:00—454. Structure, Morphology, and Properties of Block Copolymers. R. T. LaFlair, Polymer Corp. Ltd., Canada. 1:30—454 A. Heterophases in Block Copolymer-Solvant Systems in the Liquid and the Solid States. C. Sadron, C.N.R.S., Centre de Biophysique Moléculaire de Orleans, France. 2:20—455. Factors Governing the Elastomeric Properties of ABA Block Polymers. M. M. Morton, U of Akron, U.S.A. 3:10—456. Some Recent Developments of Rubber Modified Polymers Impact Resistant Materials. G. Riess, Ecole Supérieure de Chimie de Mulhouse, France. 4:00—457. Toughening Mechanism of Rubber-Reinforced Plastics. M. Matsuo, Bell Telephone Labs., Inc., U.S.A.

John B. Hynes Civic Auditorium Room #200 (Second Floor)

Symposium M-7 Reactions and Modifications of Polymers Chairman: H. J. Harwood, U of Akron, U.S.A. Wee Chairman: N. A. Plate, Moscow State U, U.S.S.R. 9:00—Opening Remarks. H. J. Harwood. 9:05—440. Physical Properties of Chain Molecules as Reflected in their Chemical Reactivity. H. Morawetz, Polytechnic Inst, of Brooklyn, U.S.A. 10:00—441. Catenation et Alkylboration des Polydienes. C. Pinazzi et al., U of Caen, France. 2:00—442. Problems Concerning the Gen­ eral Theory of Macromolecular Reactiv­ ity. N. A. Plate, Moscow State U, U.S.S.R. 2:45—443. Influence of Reaction Condi­ tions on the Sequence Kinetics During Partial Hydrolysis of Poly(Methyl Methacrylate). E. Klesper, W. Gronski, V. Barth, A. Johnsen, U of Freiburg, West Germany. 3:30—444. Reactive Polymers with Redox Capabilities. H. G. Cassidy, Yale U, U.S.A. 4:20—445. Nucleophi lie Substitution on Polymethylmethacrylate. Reaction of Methyldulfinyl Carbanion at Room Tem­ perature. J. C. Galin, F. Arranz, M. Galin, P. Rempp, C.N.R.S., France. 4:40—446. The Crosslinking of Aqueous Polymer Solutions by Gamma Radiation. E. Kiran, Princeton U, F. Rodriguez, Cornell U. U.S.A.

WEDNESDAY MORNING John B. Hynes Civic Auditorium Room #207 (Second Floor)

Discussion Session A 11A.M. Discussion Leader: R. W. Lenz, U of Massachusetts, U.S.A. 447.—Antioxidant Behavior of Polymers. D. S. Chakraborty, U. S. Nandi, Indian Assoc, for the Cultivation of Science, India. 448.—Thermal Degradation of Polyacryloni trile and Aerylonitrile Styrène Copolymers. D. Braun, R. Disselhoff, Deutsches Kunstsoff-lnst., West Germany 449.—Reduction of Nitroaromatic Functions in Polystyrene and Styrene Copolymers with Phenylhydrazine. H. H. Seliger, U of Freiburg, West Germany.

Discussion Session Β

12 Noon

450.—Kinetic Study of the Quaternization of Poly(2 Vinylpyridine) and Poly(2 Methyl 5 Vinylpyridine). J. Sauvage, C. Loucheux, U of Lille, France. 451.—Moderate Temperature Pyrolysis of Polyacrylic Acid. F. X. Roux, R. Audebert, U of Paris, France. 452.—Intramolecular Reaction of Linear Condensation Polymers. R. F. T. Stepto, D. R. Waywell, U of Manchester, En­ gland.

THURSDAY MORNING AND AFTERNOON John B. Hynes Civic Auditorium Rooms D and Ε (First Floor)

Symposium M-8 Heterophase Polymer Systems Chairman: D. J. Meier, Shell Chemical Co., U.S.A. Wee Chairman: J. F. Hender­ son, Polymer Corp. Ltd., Can­ ada

THURSDAY MORNING John B. Hynes Civic Auditorium Room F (First Floor)

Discussion Session A

11A.M.

Discussion Leader: D. Turner, Drexel U, U.S.A.

T.

458.—Explanation of the Rivlin-Mooney Equation for the Stress-Strain Behavior of Elastomers. J. Schwarz, Technical U of Clausthal, West Germany. 459.—DSC Studies of Polyurethane Block Polymers. R. W. Seymour, S. L. Cooper, U of Wisconsin, U.S.A. 460.—The Difference in Mechanical Properties of Fibers of Linear Polyetherurethanes Prepared with Different Diamines. H. G. M. Lampe, A. C. A. M. Bleijenberg, D. Heikens, A. L. German, Eindhoven U of Technology, the Netherlands.

Discussion Session Β

12 Noon

461.—Block-Graft Polymers from Polyethyl­ ene and Preactivated Polyamids by Mechano-Chemical Reactions. H. Craubner, Max Planck Inst, for Breeding, West Germany. 462.—Separation of Polymer Homologs on Demixing—Dependence on the Type of Mixed Solvent. B. A. Wolf, J. W. Breitenbach, H. Senftl, U of Mainz, West Germany. 463.—Morphology and Deformation Mecha­ nism of Segmented Polyurethanes in Re­ lation to Spherulitic Crystalline Texture. I. Kimura, H. Ishihara, H. Ono, Toyo-bo Co., Ltd.; N. Yoshihara, H. Kawai, Kyoto U, Japan. 464.—Structure of Mesomorphic Phases Observed with Block Copolymers of Dif­ ferent Alkyl Methacrylates. H. Ailhaud, Y. Gallot, A. Skoulios, Centre de Re­ cherches, sur les Macromolecules, France.

THURSDAY MORNING AND AFTERNOON Sheraton-Boston Hotel Independence Rooms Β and Floor)

C (Second

Symposium M-9 Medical Polymers Chairman: D. Lim, Academy of Sciences, Czechoslovakia Wee Chairman: F. Leonard, Walter Reed Army Medical Cen­ ter, U.S.A. 9:00—465. Investigation of the Effect of Solutions of Some Hydrophylic Polymers on Blood. D. Lim, L. Sprincl, J. Kopecek, Academy of Sciences, Czechoslova­ kia. 9:40—466. Molecular Interactions Occur­ ring at the Polymer-Living System Inter­ face. D. J. Lyman, U of Utah, U.S.A. 10:20—467. The Synthesis and Pharmaceu­ tical Applications of Polysaccharides. C. Schuerch, State U of New York Col­ lege of Forestry, U.S.A. 2:00—468. Catalysis of Ester Hydrolysis by Synthetic Macromolecules—A Contrast with Natural Enzymes. C. G. Overberger, M. Morimoto, I. Cho, P. H. Vandewyer, R. C. Glowaky, j . C. Salamone, U of Michigan, U.S.A. 2:40—469. lonotropic Gels and Biological Tissue. H. Thiele, U of Kiel, West Ger­ many.

3:20—470. Macromolecular Aspects of Bio­ compatible Materials. S. D. Bruck, Na­ tional Inst, of Health, U.S.A. 4:00—471. Structure, Properties, and Biocompatability of Polyelectrolyte Com­ plexes. R. A. Cross, Amicon Corp.; A. S. Michaels, Pharmetrics, Inc., U.S.A.

THURSDAY MORNING Sheraton-Boston Hotel Independence Rooms Β and Floor)

C (Second

Discussion Session 11A.M. Discussion Leader: R. Hegyeli, National Hi art and Lung Inst., U.S.A. 472.—Prediction of Lipid Uptake by Pros­ thetic Heart Valve Poppets from Solu­ bility Parameters. J. Moacanin, D. D. Lawson, California Inst, of Technology; H. P. Chin, E. C. Harrison, D. H. Blankenhorn, U of Southern California, U.S.A. 473.—Swelling Pressure of Poly(glyceryl methacrylate) Hydrogels. M. F. Refojo, Retina Foundation, U.S.A. 474.—Degradation of Surgical Repair Poly­ mers. F. Leonard, A. F. Hegyeli, J. Nelson, Walter Reed Army Medical Cen­ ter, U.S.A. 475.—Grafting of Monomers to Collagen and Soft and Hard Tissues. G. M. Brauer, D. J. Termini, National Bureau of Standards, U.S.A. 476.—Solid Phase Radioimmunoassay. G. A. Grode, R. D. Falb, Battelle Memorial Inst, U.S.A. „ , w 477.—Molluscicidal Rubber. S. V. Kanakkanatt, P. P. Patnode, N. F. Cardarelli, U of Akron, U.S.A. 478.—Interface Conversion for the Prepara­ tion of Hydrophilic Gel Interfaces. J. D. Andrade, D. Gough, R. Van Wagenon, U of Utah, U.S.A.

THURSDAY MORNING AND AFTERNOON Sheraton-Boston Hotel Commonwealth Room (Third Floor)

Symposium M-10 Polymeriza­ tion and Copolymerization of Heterocyclics Chairman: J. Furukawa, Kyoto U, Japan Vice Chairman: O. Vogl, U of Massachusetts, U.S.A. 9:00—Introductory Remarks. J. Furukawa. 9:05—479. Polymerization of Cyclic Ethers. T. Saegusa, Kyoto U, Japan. 9:40—480. Polymerization of Perfluoroepoxides. H. S. Eleuterio, E. I. du Pont de Nemours & Co., U.S.A. 10:15—481. Kinetics and Mechanism of Polymerization of Oxygen Heterocyclics. N. S. Enikolopyan, Academy of Sciences, U.S.S.R. 2:00—482. New Trioxane Copolymers. H. Cherdron, Farbwerke Hoechst AG, West Germany. 2:45—483. Polymerization of Episulfides. F. Lautenschlaeger, Dunlop Research Centre, Canada. 3:25—484. Lactone Polymers. G. L Brode, J. V. Koleske, Union Carbide Corp., U.S.A. 4:05—485. Lactam Polymers. J. Sebenda, Academy of Sciences, Czechoslovakia. 4:45—Concluding Remarks. 0. Vogl.

THURSDAY MORNING Sheraton-Boston Hotel Jefferson Room (Third Floor)

Discussion Session A 11 A.M. Discussion Leader: T. Saeg­ usa, Kyoto U, Japan 486.—Some Aspects of Epoxide Copoly­ merization with the Catalytic System AlEt-j-HaO. M. Dimonie, C. Oprescu, 0. luselin, L. T. Phai, 0. Solomon, Polytechnic Inst, of Bucharest, Romania. 487.—Anionic Polymerization of Propylene Oxide. L. P. Blanchard, J. Moinard, F. Tahiani, U of Laval, Canada. 488.—New Interpretation of the So-called Solid-State Polymerization of 3,3-Bioschloromethyloxetane (BCMO). B. Keggenhoff, G. Wegner, U of Mainz, West Germany. 489.—On the Mechanism of Cationic Poly­ merization of 1,3-Dioxolane. K. Boehlke, P. Weyland, V. Jaacks, U of Mainz, West Germany.

490.—Ring-Formation in the Polymerization of 1,3-Dioxolane. T. Kelen, Academy of Sciences, Hungary; D. Schlotterbeck, V. Jaacks, U of Mainz, West Germany.

Discussion Session Β

12 Noon

491.—Highly Stereoelective Polymerization Processes. M. Sepulchre, N. Spassky, P. Sigwalt, Laboratoire de Chimie Macromoleculaire de Paris, France. 492.—Cationic Polymerization of Cyclic Sulfides. I I . Evaluation of the Rate Constants of Propagation by Free Ions and by Ion Pairs. W. Drijvers, E. J. Goethals, U of Ghent, Belgium. 493.—Some Problems in the Mechanism of Anionic Polymerization of Lactams in Relation to Their Polymerizability. H. Sekiguchi, B. Coutin, Lab de Chimie Macromoleculaire, Ecole Supérieure de Physique et de Chimie Industrielles de Paris, France. 494.—Polymerization of Caprolactam—on the Condensation Equilibrium. H. K. Reimschuessel, G. J. Dege, Allied Chemical Corp., U.S.A. 495.—On the Optimization of Caprolactam Polymerization. H. Κ. Reimschuessel, Κ. Nagasubramanian, Allied Chemical Corp., U.S.A.

FRIDAY MORNING AND AFTERNOON John B. Hynes Civic Auditorium Room #200 (Second Floor)

Symposium M-11 Olefin Co­ polymers Chairman: W. Cooper, Dunlop Research Centre, England Vice Chairman: F. C. Foster, Chemplex Co., U.S.A. 9:00—Introductory Remarks. W. Cooper. 9:05—496. Alternate Copolymerization of Butadiene and Propylene. J. Furukawa, Kyoto U, Japan. 10:05—497. Ethylene-Alpha-Olefin Copoly­ mers Made by the Phillips Process. J. P. Hogan, B. E. Nasser, R. T. Werkman, Phillips Petroleum Co., U.S.A. 2:00—498. A Discussion of Some Poly­ merization Parameters in the Synthesis of EPDM Elastomers. E. K. Easterbrook, T. J. Brett, Jr., Uniroyal Chemical, Inc.; F. C. Loveless, D. N. Matthews, Uniroyal Research Center, U.S.A. 2:45—499. Relationships Between the Structure of Ethylene-Propylene Copoly­ mers and the Physical Properties of Elastomeric and Plastomeric Materials Derived from Them. A. Valvassori, V. Zamboni, Montecatini Edison, Italy. 3:15—500. Recent Developments in the Synthesis of EPDM Elastomers. E. W. Duck, International Synthetic Rubber Co., Ltd.; W. Cooper, Dunlop Research Centre, England.

FRIDAY MORNING John B. Hynes Civic Auditorium Room #207 (Second Floor)

Discussion Session A 11 A.M. Discussion Leader: E. W. Duck, International Synthetic Rubber Co., Ltd., England 501.—New Ethylene Propylene Elastomers Containing Conjugated Double Bonds. S. Arrighetti, G. Bertolini, S. Cesca, G. Ghetti, A. Roggero, SNAM Progetti S.p.A., L.S.R., Italy. 502.—Investigations on the Sequence Length Distribution by Pyrolysis of Labeled and of Inactive Ethylene-Propyl­ ene Copolymers. M. Seeger, H.-J. Cantow, U of Freiburg, West Germany; J. Exner, Academy of Sciences, Czechoslo­ vakia. 503.—Copolymers of Ethylene with Bicyclic Dienes. R. Caspary, H. Schnecko, Dun­ lop Research, West Germany. 504.—High Resolution NMR Spectrum of Poly(hex-l-ene sulfone). K. J. Ivin, M. Navratil, Queen's U of Belfast, Northern Ireland.

Discussion Session Β

12 Noon

505.—Copolymers of Styrene with Opti­ cally Active α-Olefins: Optical Rotatory Properties and Chemical Reactivity. E. Chiellini, C. Carlini, F. Ciardelli, P. Pino, U of Pisa, Italy. 506.—Mechanism of the Thermal Degrada­ tion of the Regular Alternating Copoly­ mer of Ethylene and Deuteroethylene. W. J. Bailey, L. J. Baccei, U of Mary­ land, U.S.A. JUNE 7, 1971 C&EN

67

507.—A New High-Temperature Thermo­ plastic Material: TetrafluoroethyleneEthylene Copolymer. M. Modena, C. Garbuglio, M. Ragazzini, Montecatini Edison, Italy. 508.—The Copolymerization of Ethylene and Vinylacetate at Low Pressure. De­ termination of the Kinetics by Sequen­ tial Sampling. A. L. German, D. Heikens, Eindhoven U of Technology, the Netherlands.

FRIDAY MORNING AND AFTERNOON John B. Hynes Civic Auditorium Rooms D and Ε (First Floor)

Symposium M-12 Develop­ ments in Polymer Morphology Chairman: E. W. Fischer, Univ. of Mainz, West Germany Vice Chairman: F. Price, Univ. of Massachusetts, U.S.A. 9:00—509. Some Recent Developments in the Study of Polymer Crystals. A. Kel­ ler, U of Bristol, England. 9:30—510. The Effect of Rotational Isom­ erism on Molecular Order and Mobility in Solid Polymers. W. Pechhold, U of Stuttgart, West Germany. 10:15—511. The Relation between Ther­ modynamic and Morphological Properties of Bulk and Solution Crystallized Poly­ mers. L. Mandelkern, Florida State U, U.S.A. 2:00—512. The Morphology of Oriented Crystalline Polymers. A. Peterlin, Re­ search Triangle Inst., U.S.A. 2:30—513. Macroscopic Kinking in Poly­ mers. R. E. Robertson, Ford Motor Co., U.S.A.

FRIDAY MORNING AND AFTERNOON Sheraton-Boston Hotel Independence Rooms Β and Floor)

C (Second

Symposium M-13 Interface and Adhesion Problems in Polymer Composites Chairman: J. B. Donnet, Ecole Supérieure de Chimie de Mulhouse, France Vice Chairman: A. N. Gent, U of Akron, U.S.A. 9:00—526. Theory of Polymer Behavior Near a Surface with Application to a Polymer Between Plates. E. A. DiMarzio, National Bureau of Standards, U.S.A. 9:45—527. Adsorption-Interdiffusion Mechanisms of Bonding in Polymer Composites. D. H. Kaelble, North American Rockwell Corp., U.S.A. 10:30—528. Toughening Mechanisms in Glass Polymers. F. J. McGarry, Massachusetts Inst, of Technology, U.S.A. 11:15—529. Surface Free Energy and Composite Construction. W. C. Wake, City U of London, England. 1:00—530. The Relationship of Carbon and Graphite Fiber Surface Activity to Polymer Composite Properties. J. W. Herrick, Norton Co., U.S.A. 1:45—531. Chemical Interactions Between Glasses and Polymers. W. A. Weyl, Pennsylvania State U, U.S.A. 2:30—532. Interfacial Characteristics and the Design of Fibrous Composites. J. G. Morley, U of Nottingham, England. 3:15—533. A Nuclear Magnetic Resonance Study on the Adsorption of Poly(Methyl Methacrylate) at a Solid-Liquid Interface. H.-J. Cantow, T. Miyamoto, U of Freiburg, West Germany.

FRIDAY MORNING

Sheraton-Boston Hotel Commonwealth Room (Third Floor)

John B. Hynes Civic Auditorium Room F (First Floor)

Symposium M-14 New Monomers and Polymers 11 A.M.

Discussion Leader: K. Wolf, Badische Anilin and Soda Fabrik, AG, West Germany 514.—The Thermodynamic Stability of Poly­ mer Liquid Crystals. E. L. Wee, J. Rai, W. G. Miller, U of Minnesota, U.S.A. 515.—State of Order of Hydroxyl Groups and of Molecular Segments in Cellulose Morphology. S. P. Rowland, E. J. Rob­ erts, J. L. Bose, C. P. Wade, Southern Regional Research Lab., U.S.A. 516.—Polyoxymethylene Crystals Formed Inside Irradiated Trioxane Crystals. D. H. Reneker, J. P. Colson, National Bu­ reau of Standards, U.S.A. 517.—Some Kinetic Aspects Regarding the Solid State Polymerization of Trioxane. I. Voigt-Martin, U of Mainz, West Ger­ many. 518.—Crystalline Order in Polyethyleneterephthalate. H. G. Zachmann, G. Konrad, U. Ejchoff, U of Mainz, West Germany. 519.—I. R. Spectra of Poly(trans-l,4-butadiene) Single Crystal Mats. C. Hendrix, D. A. Whiting, A. E. Woodward, City Col­ lege, City U of New York, U.S.A.

Discussion Session Β

C&EN JUNE 7, 1971

Discussion Session Β

TUESDAY MORNING

12 Noon

546.—A Polyesteramide of Hexamethylene Diamine, Hydroxypivalic Acid, and Terephthalic Acid. N. Heyboer, AKZO Re­ search Lab., The Netherlands. 547.—New Polyamides via Ritter Reaction. L T. C. Lee, E. M. Pearce, Allied Chem­ ical Corp., U.S.A. 548.—Bonding in Polymers with Iodine as a Chain Atom. H. K. Livingston, J. Kresta, Wayne State U, U.S.A. 549.—Equilibrium Formation of Polyanhydrides. V. Zvonar, Research Inst, for Synthetic Resins and Lacquers, Czecho­ slovakia. 550.—Ionic Polymerization of Some Epoxyaldehydes in the Presence of Aluminium Iso-Propylate as a Catalyst. Z. Jedlinski, J. Majnusz, Academy of Sciences, Poland. 551.—New Conductive Polymers for Electrographic Reproduction. D. Timmerman, W. De Winter, Gevaert-Agfa N.V., Bel­ gium. 552.—A Chemical Examination of the Re­ action of Thermal Fusion of a-Aminoacids. F. Millich, C. S. V. Raghaven, U of Missouri, U.S.A.

Chairman: W. Kern, U of Mainz, West Germany Vice Chairman: J. K. Stille, U of Iowa, U.S.A. 9:00—534. Studies on the Mechanism of the Ring-Opening Polymerization of Cycloolefins with Particular Reference to Cycloolefin Copolymerizations. G. Dall'Astra, Montecatini Edison, Italy. 9:45—535. Equilibrium Ring-Opening Polymerization of Mono- and Multicyclic Unsaturated Monomers. E. A. Ofstead, N. Calderon, Goodyear Tire & Rubber Co., U.S.A. 10:30—536. Topochemical Polymerization of Monomers with Conjugated TripleBonds. G. Wegner, U of Mainz, West Germany. 2:00—537. New Asymmetric Polymers and Their Optical Properties in Solution. C. G. Overberger, U of Michigan, U.S.A. 2:40—538. Synthesis and Electrochemical Behavior of Some New Polymer Redox Systems. G. Manecke, Free U of Berlin, West Germany. 3:20—539. Cycloaddition Polymerization. J. K. Stille, U of Iowa, U.S.A.

Sheraton-Boston Hotel Berkeley Room (Third Floor)

Discussion Session A 11 A.M. Discussion Leader: R. E. Heck, Hercules, Inc., U.S.A. 564.—Stereoselective Synthesis of Trans and Cis-1,4-Dienes. W. Schneider, B F Goodrich Research Center, U.S.A.

Discussion Session Β

12 Noon

565.—Polymerization of Vinyl Monomers with Dialkylbis(dipyridyl)iron(ll). A. Yamanoto, T. Yamamoto, S. Ikeda, Tokyo Inst, of Technology, Japan. 566.—Homogeneous Catalysts for Olefin Disproportionation. W. B. Hughes, E. A. Zuech, E. T. Kittleman, D. H. Kubicek, Phillips Petroleum Co., U.S.A.

MONDAY MORNING AND TUESDAY MORNING AND AFTERNOON John B. Hynes Civic Auditorium Room #200 (Second Floor)

Sheraton-Boston Hotel Exeter Room (Third Floor)

Discussion Session

12 Noon

Unclassified Macromolecular Chemistry Papers Discussion Leader: S. Krimm, U of Michigan, U.S.A. 553.—The Calculation of the Elestic Modu­ lus of Helical Polymers Using Results from Infrared Spectroscopy. T. R. Manley, C. G. Martin, Newcastle-upon-Tyne Polytechnic, England. 554.—Branched Polypeptides in Solution and at the Air-Water Interface. J. P. Williot, J. M. Ruysschaert, J. Jaffe, U Libre de Bruxelles, Belgium. 555.—Complex Formation Between Poly A and Poly U. J. C. Thrierr, M. Leng, Centre de Biophysique Moléculaire de Orleans, France. 556.—Studies on Molecular Weight Distribution of Polymers Deduced from Average Molecular Weights. A. Kotera, T. Saito, K. Takemura, Tokyo Kyoiku Univ, Japan. 557.—Solubility and Swelling of Poly(Vinyl Chloride). L. A. Utracki, Gulf Oil Canada, Ltd., Canada. 558.—Molecular Weight Distribution of PBI in DMAC. M. Gehatia, Wright-Patterson AFB; D. R. Wiff, U of Dayton, U.S.A.

Symposium J-2 Mechanism of Enzyme Action Chairman: D. E. Koshland Jr Univ. of California, U.S.A. Wee Chairman: D. C Phillips Oxford U, England 2:00-567 X-Ray Structure of Active m n t e « « D " T C » ; P t , U , E s ' - 0 x f o r d U, England. J:UU—5b8. The Mechanism of Oxygen Re­ duction by Oxidases. B. G. Malmstrom, * £. halm JL rs l n s t - o f Technology, Sweden. 4:00—569. Structure and Function of Pa­ pain. J. Drenth, Lab. voor Structuurchemie, the Netherlands. 9:00—570. Mechanisms of Enzymic De­ carboxylations. F. H. Westheimer, Har­ vard U, U.S.A. 10:00—571. Rearrangements Catalyzed by Enzymes. R. H. Abeles, Brandeis U, 2:00—572. Nuclear Magnetic Resonance Studies of Enzymes and Proteins. M. A. Raftery, W. H. Huestis, M. Blumenstein, F. Millett, California Inst, of Technol­ ogy, U.S.A. 2:45—573. Mechanism of Action of Alco­ hol Dehydrogenase. Α. Η. Τ. Theorell, Karolinska Inst., Sweden. 3:30—574. Fast Reactions in Catalysis. M. Eigen, Max Planck Institute for Physical Chemistry, West Germany. 4:15—575. Structure and Function of Ribonuclease. F. M. Richards, H. W. Wyckoff, Yale U, U.S.A.

TUESDAY MORNING

JOINT SYMPOSIA

12 Noon

520.—Lamellar Thickening in Polyethylene Single Crystals Under Low and High Pressure. R. Roe, C. Gieniewski, R. G. Vadimsky, Bell Telephone Lab., Inc., U.S.A. 521.—Melting of Irradiated Dilute Solu­ tion Crystals of Polyethylene. J. Jack­ son, U of Maryland, U.S.A. 522.—The Effect of Molecular Weight on the Crystallization Kinetics of Linear Polyethylene. E. Ergoz, J. G. Fatou, L. Mandelkern, Florida State U, U.S.A. 523.—Cis/Trans Isomorphism in 1,4-BisAminomethylcyclohexane Polyamides. F. R. Prince, R. J. Fredericks, Allied Chem­ ical Corp., U.S.A. 524.—Molecular Conformation and Packing of PolyCvinylidene Fluoride). H. Tadokoro, R. Hasegawa, M. Kobayashi, Y. Takahashi, Y. Chatani, Osaka U, Japan. 525.—Rotational Mobility of Nitroxyl Rad­ icals in Polyesters. S. C. Gross, East­ man Kodak Co., U.S.A. 68

4:00—561. Catalytic Formation of Macrocyclic Polyenes from Butadiene. A. Miyake, Toray Industries, Inc., Japan. 9:00—562. Polymerization with Homogeneous Transition Metal Alkyl Compounds. D. G. H. Ballard, Imperial Chemical Industries, Ltd., England. 10:00—563. Homogeneous Reactions Catalysed by Group VIII Metal Systems. H. Boennemann, Ch. Grard, W. Kopp, G. Wilke, Max Planck Inst, for Coal Research, West Germany.

FRIDAY FRIDAY MORNING AND AFTERNOON

Discussion Session A

543.—New Synthesis of Soluble Polybenzothiazoles of High Thermal Stability. C. Blaise, P. Lochon, J. Néel, Lab. de Chimie-Physique Macromoleculaire, Ecole Nationale Supérieure des Industries Chimiques de Nancy, France. 544.—Synthesis and Characteristics of Anthracene Containing Polybenzyls. G. Montaudo, P. Finocchiarao, S. Caccamese, U of Catania, Italy. 545.—Syntheses and Physical Properties of Fully Aromatic Poly(benzoxazole-imides) with Alternating Repeating Units. N. Yoda, N. Dokoshi, S. Fujita, M. Kurihara, T. Sugie, Toray Industries, Inc., Japan.

FRIDAY MORNING

MONDAY AFTERNOON AND TUESDAY MORNING

Sheraton-Boston Hotel Jefferson Room (Third Floor)

Discussion Session A

11 A.M.

Discussion Leader: E. L. Wittbecker, E. I. du Pont de Nemours & Co., U.S.A. 540.—Topological Aspects Concerned with the Metathesis Reaction on Cycloolefins. R. Wolovsky, Z. Nir, Weizmann Inst, of Science, Israel. 541.—Stereoregular Polymers from Dissymmetric Aliènes of Type R—CH=C= CH—R. R. Rossi, G. Ingrosso, L Porri, U of Pisa, Italy. 542.—High-molecular Weight Compounds Prepared by Electrolysis of Phenols. R. Dijkstra, J. de Jonge, Philips Research Labs., the Netherlands.

Sheraton-Boston Hotel Fairfax Room (Third Floor)

John B. Hynes Civic Auditorium Room #207 (Second Floor)

Discussion Session A 11 A.M. Discussion Leader: B. L. Val­ lée, Peter Bent Brigham Hospital, U.S.A.

Chairman: G. Wilke, Max Planck Inst, for Coal Research, West Germany Wee Chairman: R. F. Heck, Hercules, Inc., U.S.A.

576.—The Mechanism of Corticosteroid Acyltransferase from the Primate Brain. R. H. Purdy, Southwest Foundation for Research and Education, U.S.A. 577.—Conformational Changes in Some Ribonuclease-lnhibitor Complexes. E. R. Simons, Harvard Medical School, U.S.A. 578.—Identification of a Carboxyl Group in the Active Site of Bacillus Cereus 569/H Penicillinase. G. V. Patil, R. A. Day, U of Cincinnati, U.S.A.

2:00—559. Methathesis of Olefins by Homogeneous Catalysts. N. Calderon, Goodyear Tire & Rubber Co., U.S.A. 3:00—560. Catalysis of Some Insertion Reactions by Nickel Complexes. G. P. Chiusoli, Montecatini Edison, S.p.A., Italy.

579.—Nonenzymatic Models of NADH Ac­ tion. Importance of Hydrogen-Bonding in the Enzyme-Coenzyme-Substrate Com­ plex. U. K. Pandit, F. R. Mas Cabre, U of Amsterdam, the Netherlands.

Symposium J-1 ous Catalysis

Homogene-

Discussion Session Β

12 Noon

580.—Studies on the Pepsin-Catalyzed Hy­ drolysis of Sulfite Esters. S. W. May, Esso Research & Engineering Co.; Ε. Τ. Kaiser, U of Chicago, U.S.A. 581.—pH Dependence of a-Chymotrpsincatalyzed Hydrolysis of N-acetyl-L-trypotophan Methyl Ester (ΑΤΜΕ). Evidence for the Involvement of Alanine 149 in the Alkaline Inactivation of a-Chymotrypsm. M. L. Bender, P. Valenzuela, Northwestern U, U.S.A. 582.—NMR Studies on the Active Site of Carbonic Anhydrase. J. M. Pesando, Al­ bert Einstein College of Medicine, U.S.A. 583.—Substrate Conformational Changes Induced by an Enzyme. N. V. Gnucfiev, E. S. Severin, V. G. Tumanyan, R. M. Khomutov, Academy of Sciences, U.S.S.R.

WEDNESDAY MORNING AND AFTERNOON Sheraton-Boston Hotel Fairfax Room (Third Floor)

Symposium J-3 Advances in Conformational Analysis Chairman: P. Pino, Eidgenossische Technische Hochschule, Switzerland Vice Chairman: E. L. Eliel, U of Notre Dame, U.S.A. 9:00—Introduction. D. H. R. Barton, Im­ perial College, England. 9:20—584. Use of Semiempirical Calcula­ tions in Conformational Analysis of Small and Large Molecules. S. Lifson, Weizmann Inst, of Science, Israel. 10:20—585. Recent X-Ray Studies of Con­ formation. P. Corradini, U of Naples, Italy. 11:30—586. Investigation of Conforma­ tional Equilibria in Small and Large Molecules by NMR Spectroscopy. F. A. Bovey, Bell telephone Labs., Inc., U.S.A. 2:15—587. Aspects of the Conformational Analysis of Synthetic High Polymers and Model Compounds. M. Goodman, Poly­ technic Inst, of Brooklyn, U.S.A. 3:45—588. Aspects of Conformational Analysis of Small Molecules. E. L. Eliel, U of Notre Dame, U.S.A.

WEDNESDAY AFTERNOON Sheraton-Boston Hotel Berkeley Room (Third Floor)

Discussion Session A 12 Noon Discussion Leader: N. L. Al­ longer, U of Georgia, U.S.A. 589.—Semiempirical Calculations of Hy­ drocarbon Single Chain Conformations (PE, PP, PIB) and of Some Properties of Pairs of Kink Isomers and of the Ideal Crystal (PE). P. C. Hâgele, G.

Wobser, W. Pechhold, S. Blasenbrey, U of Stuttgart, West Germany. 590.—NMR Line Widths of Proteins in Solution. J. H. Bradbury, Β. Ε. Chapman, N. L. R. King, Australian National U, Australia. 591.—Stochastic Models for the Descrip­ tion of Chains with Interactions. Z. Alexandrowicz, Weizmann Inst, of Sci­ ence, Israel. 592.—Conformation of Chains with Interac­ tions Studied by the Monte-Carlo Dimerization Method. Z. Alexandrowicz, Weizmann Inst, of Science, Israel.

Discussion Session Β

593.—Excluded-Volume Effect on Dipole Moments of Polymer Chains. K. Nagai, T. Ishikawa, Government Industrial Re­ search Inst., Japan. 594.—Molecular Structure and Molecular Weight Distribution of Polyethylene Terephthalate. G. Meyerhoff, S. Shimotsuma, U of Mainz, West Germany. 595.—Conformational Study of Serine Dipeptides by Using I.R. Spectroscopy. M. Marraud, J. Néel, Lab. de ChimiePhysique Macromoleculaire, Ecole Nationale Supérieure des Industries Chimiques de Nancy, France. 596.—Conformational Preferences of Aromatic Compounds of the Type Ar-X-Ar. G. Montaudo, P. Finocchiaro, F. Bottino, S. Caccamese, P. Maravigna, E. Trivellone, U of Catania, Italy.

THURSDAY MORNING AND AFTERNOON Sheraton-Boston Hotel Fairfax Room (Third Floor)

Symposium J-4 Ion Pair Processes Chairman: M. Szwarc, State U of New York College of Forestry, U.S.A. Wee Chairman: S. Bywater, National Research Council of Canada 9:00—597. End Group Association and Complexation in Anionic Polymerization. G. Smets, U of Louvain, Belgium. 9:45—598. Ion Pairs of Polymerizations in Aqueous Solutions. V. A. Kabanov, Moscow State U, U.S.S.R. 10:30—599. Recent Magnetic Resonance Studies of Ion Pairs. N. M. Atherton, U of Sheffield, England. 11:15—600. Ion Pairs of Triplets. E. de Boer, J. L. Sommerdijk, J. A. M. van Broekhoven, U of Nijmegen, the Netherlands. 2:00—601. Direct and Indirect Evidence of Monomer Solvation of Ionic Species in Polymerization Reactions. P. Sigwalt, U of Paris, France.

Letters Continued

1 P.M.

from page 7

• Then three people in a h u n d r e d need essential money temporarily, say $5000 per year. This totals to $15,000. With 97 people in that h u n d r e d still em­ ployed at say $8000 per year on the aver­ age and paying premiums, they total $776,000. • This ratios at $15,000/$776,000 = 1.9%. • In other words, p r e m i u m s in this as­ sumed case would be set at $8000 χ 0.019 = $155 per year or about $12.50 per month. This sounds like bargain job security even before the p r e m i u m s are reduced by actuating and funding. This may not be as naive as it sounds at first glance. The argument that it would just produce a b u n c h of gold bricks may be warped by a hangup factor. Private systems can screen and select willing workers within a given group such as our professional society where the members have already established their unwillingness to live at a $5000 rate. We would get some b u t not all into the gold-brick class, and we could chalk u p a bit toward charity for this. The point is t h a t we really don't know how real a factor it is. Concretely, if my slide rule does not

3:00—602. Concept of Ion Pairs and Their Behavior in Chemical Reactions. M. Szwarc, State U of New York College of Forestry, U.S.A. 4:00—603. Ion Pairs: Relaxation Processes and Structure. H. Strehlow, Max Planck Inst, for Physical Chemistry, West Germany.

THURSDAY AFTERNOON Sheraton-Boston Hotel Berkeley Room (Third Floor)

Discussion Session 12 Noon Discussion Leader: S. Bywater, National Research Council of Canada 604.—Polymerization of 4-Vinylpyridinium Salts. IV. Acid-Catalyzed Spontaneous Polymerization. J. C. Salamone, B. Snider, W. L. Fitch, E. J. Ellis, P. L Dholakia, Lowell Technological Inst., U.S.A. 605.—Polymerization of Isoprene Inititated by Tetraethylzincate of Calcium, Strontium, and Barium. Evidence for a New Living Polymer. F. Kaufmann, B.Kaempf, A. Deluzarche, A. Maillard, F. Schué, Inst, de Chimie de Strasbourg, France. 606.—Polymerization of Isoprene Inititated by Tetraethylzincate of Calcium, Strontium, and Barium. F. Kaufmann, F. Schué, A. Deluzarche, A. Maillard, B. Kaempf, Inst. de Chimie de Strasbourg, France. 607.—Penultimate Unit Effect in the Anionic Polymerization of Styrene. Ε. Walckiers, M. Van Beylen, U of Louvain, Belgium. 608.—Influence of Small Additions of Hexamethylphosphotriamide on the Kinetics of Anionic Polymerization of Styrenë in Tetrahydrofurance. B. Levresse, E. Franta, P. Rempp, Centre de Recherches sur les Macromolecules de Strasbourg, France. 609.—Proton Magnetic Resonance Study of Lithium Silanolates. I. Preliminary Observations. P. C. Juliano, W. A. Fessier, J. D. Cargioli, General Electric Research and Development Center, U.S.A.

THURSDAY MORNING AND AFTERNOON John B. Hynes Civic Auditorium Room #200 (Second Floor)

Symposium J-5 Synthesis and Conformation of Biopolymers Chairman: E. Katchalski, Weizman Inst, of Science, Israel Wee Chairman: R. B. Merrifield, Rockefeller U, U.S.A. 9:00—Introductory ski.

Remarks.

lie, let's consider approaching a private insurance concern with this idea as a national society offering help. Possibly one of the foundations would consider this a worthy experiment to determine how much of our social resistance to what appears to be a mathematically sound system is warranted. With today's better understanding of people, such problems might be worked out on a pri­ vate, freedom-of-choice, and thus sounder basis. John J. Dyson Janesville, Wis. SIRS: It is depressing to read the many reports of chemists w h o cannot find em­ ployment related to their training and competence. It is even more depressing to hear the m a n y voices of people w h o seem to think that the only solution to the problem lies in the federal bureauc­ racy and the use of public funds. Has the Federal Government become so domi­ n a n t in our lives that self-help and indi­ vidual initiative are unthinkable? Surely the supply of good ideas for new business based on the chemical sciences has not been exhausted! How many such ideas lie d o r m a n t in the minds of ACS members? How many of these lack only the proper application of seed capital to germinate and prosper? How m u c h of a dent could be m a d e in the unemployment

E. Katchal-

9:05—610. The Synthesis of Peptides and Proteins by the Solid Phase Method. R. B. Merrifield, B. Gutte, Rockefeller U, U.S.A. 10:00—611. Synthetic Analogues of Staphylococcal Nuclease; Studies of Activity and Conformation. C. B. Anfinsen, National Inst, of Health, U.S.A. 11:00—612. Refinement of Protein Structure by Energy Calculations. S. Lifson, Weizmann Inst, of Science, Israel. 2:00—613. Factors Affecting the Folding of Polypeptide Chains in Proteins. H. A. Scheraga, Cornell U, U.S.A. 3:00—614. Chemical Synthesis of Polynucleotides. K. L. Agarwal, A. Yamazaki, P. J. Cashion, H. G. Khorana, Massachusetts Inst, of Technology, U.S.A. 4:00—615. Conformational Studies on tRNA. F. Cramer, Max Planck Inst., West Germany.

THURSDAY AFTERNOON John B. Hynes Civic Auditorium Room #207 (Second Floor)

Discussion Session 12 Noon Discussion Leader: M. Goodman, Polytechnic Inst, of Brooklyn, U.S.A. 616.—Polymerization of a-Aminopropionitrile. S. Morimoto, C. Ponnamperuma, National Aeronautics and Space Administration, U.S.A. 617.—Synthesis and Properties of Sequential Copolypeptides made from Optically Pure Monomers. P. Hubert, E. Dellacherie, J. Néel, Lab. de Chimie-Physique Macromoleculaire, Ecole Nationale Supérieure des Industries Chimiques de Nancy, France. 618.—Studies on Spin-Labeled Polyriboadenylic Acid. A. M. Bobst, U of Cincinnati, U.S.A. 619.—Side-Chain Effect on the Helix Stability of Poly-a-Amino Acids. J. B. Aragao, M. H. Loucheux, C. Loucheux, U of Lille, France. 620.—Conformation Studies on Deoxyribonucleoprotein from Echinoderms. J. A. Subirana, J. Colom, Council for Scientific Research, Spain. 621.—Cooperativity of Electrostatic Interaction in Biopolymers; the Concept of a Histidine Switch. Κ. Ε. Reinert, Acad­ emy of Sciences, West Germany. 622.—Elongation and Stiffening of DNA Quantitatively Derived from Viscosity Measurements and Demonstrated by the System Calf Thymus DNA-Netropsin. K. E. Reinert, Academy of Sciences, West Germany. 623.—Polymers with Hydroxyl Groups as Supports for Oligonucleotide Synthesis. R. L Letsinger, Northwestern U, U.S.A.; H. H. Seliger, U of Freiburg, West Ger­ many.

problem among chemists by the develop­ ment of new businesses? How many chemists would be willing to subscribe to a stock issue in a company chartered specifically for the financing of ventures in the area of chemistry? For one, I would m u c h prefer to invest risk capital in a business that would em­ ploy chemists r a t h e r t h a n see my taxes applied to bureaucratic boondoggles. It seems to me that this is a proper issue for serious consideration by the national officers of ACS. Can the Society serve its members by coordinating and initiating business activities which would alleviate the unemployment problem? Homer A. Hartung, Ph.D. Richmond, Va. SIRS: I should like to take exception t o the letter by B. E. Weidenaar (C&EN, April 26, page 4). The main t h r u s t of his argument seems to be that an organiza­ tion's labor force is an asset j u s t like any other capital asset, inventory, etc., to be disposed of, or liquidated at the con­ venience of management. As a chemist w h o likes to think t h a t he has contrib­ uted a modicum of progress to his com­ pany, I would be infinitely dismayed to learn t h a t I was being carried on the same side of the ledger as a superfluous reaction kettle or distillation tower. A more enlightened view, and one that JUNE 7, 1971 C&EN

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