Abstract
A RECENT description by Kruber and Oberkobusch1 of the isolation from a coal tar pitch fraction of an unidentified hydrocarbon C20H12 (m.p. 216° C.) prompts me to record the isolation from a corresponding coal tar fraction of a hydrocarbon which possesses similar properties and which has been identified as 11 : 12-benzfluoranthene (I). The substance was obtained from a fraction (b.p. 269–279° C./5 mm.) produced by high-efficiency fractionation of the neutral portion of a distillate obtained during the production of pitch coke. By crystallizing the soft resinous fraction from ether, a yellow solid was obtained which was purified by the crystallization and subsequent decomposition of its 1 : 3 : 5-tri-nitrobenzene derivative. The pure hydrocarbon crystallized from benzene as very pale yellow needles, m.p. 216–217° C. It had a molecular formula of C20H12, and its ultra-violet absorption spectrum was identical with that published for 11 : 12-benzfluoranthene2.
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References
Kruber, O., and Oberkobusch, R., Chem. Ber., 85, 433 (1952).
Orchin, M., and Reggel, L., J. Amer. Chem. Soc., 73, 436 (1951).
Moureu, H., Chovin, P., and Rivoal, G., Bull. Soc. Chim., France, 99 (1948).
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HARRIS, A. Isolation of 11 : 12-Benzfluoranthene from a Coal Tar Fraction. Nature 170, 461 (1952). https://doi.org/10.1038/170461a0
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DOI: https://doi.org/10.1038/170461a0
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