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OLDER CHEMICAL LITERATURE MAY DESERVE RE-EXAMINATION I. G. TOLPIN,$ ANGELA M. KRAMER,* MARY MARGARET LALLY,* MEYER POBEREZKIN,t JACQUES POIRIER,t HELEN REZABEKT AND LLOYD TREVOYt
ITHAS been mentioned elsewhere (J. CAEM.EDUC. 21, 336, (1944)) that some older chemical literature is occasionally found to be pertinent to current research on problems which in earlier years commanded only academic interest and therefore deserves re-examination in a new light. This is especially tme with regard to the Russian scientific literature, which Gas never very completely reported outside of Russia. Two groups of chemists enrolled in classes in Russian for scientists were recently given an assignment to acquaint themselves with the contents of the group of notes on naphthenes published in the Journal of the Russian Physico-Chemical Society listed below and to determine to what extent they were reported in Chemisches Zentralblatt, Chemical Abstracts, and the abstracts in the J m w m l qf the Chemiml Society. The articles in question were:
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(1) "1,1,3,5-Tetramethylcyclohexane,"K. D. Zelinskir and E. S. Przheval'skii, J . Russ. Phys.C h m . SOC.,37, 961 (1905). (2) "1,3-Dimethyl-2-ethylcyclopentane,"N. D. Zelinskii and L. N. Glinka, ibid., 39,1170 (1907). (3) "New representatives of cyclopentane hydrocarbons," N. D. Zelinskii, ibid., 38, 1288-1289 (1906).
(4) "1,2-Dimethylcyclopentane," N. D. Zelinskil and E. S. Przheval'skii, ibid., 37, 628 (1905). (5) "Symmetrical 1,3-dimethyl-5-ethylcyclohexane," N. D. Zelinskii and E. S. Przheval'skii, ibid., p. 629. (6) "Symmetrical trimethylcyclohexane (hexahydromesitylene)," N. D. Zelinskii and S. S. Nametkin, %bid.,pp. 629330. Article No. 1 was not adequately reported, although a' later article by these authors touching on this subject' was covered. Article No. 2 was well abstracted, as was' No. 3. The fourth, fifth, and sixth articles were not located in the abstracting journals mentioned. I n view of the insufficient coverage by abstracting journals, it is not surprising t o find that some of these notes have been disregarded in important compilations of information on organic compounds. This is true also for two other examples: one note dealing with' methylcycloheptane (N. D. Zelinskii, J . Russ. Phys.Chem. Sac., 37, 962 (1905)) and the other with allyl-8 cyclohexane (N. D. Zelinskii and L. Vyshinskaya, ibid., p. 630). Northwestern University.
t Univcmity of Chicago.
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t Universal Oil Produats Com&n,v, Chicago, Illinois.
