✦ LIBER ✦

5-(2,3-diphenylcyclopropenylidene)-2(5H)-thiophenone characterization of a thiophene-inserted type compound of diphenylcyclopropenone

✍ Scribed by Kazuko Takahashi; Kazumi Nishijima; Kahei Takase; Shigeyoshi Katagiri

Publisher: Elsevier Science
Year: 1983
Tongue: French
Weight: 266 KB
Volume: 24
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(00)81366-0

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✦ Synopsis

The title compound 5 has been synthesized and the effect of cyclic z-system insertion into diphenylcyclopropenone 1 has been discussed. The distribution of positive charge over the 3membd. ring and phenyl groups slightly predominates in 5 than in parent annulenone 1, in contrast to 5-cycloheptatrienylidene_2(5H)-thiophenone 2 whose 7-membd. ring is more olefinic than parent tropone 2. Electronic spectrum of 6 exhibits a broad absorption band having a C-T character.

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