Futoshi Tanaka

TL;DR: The observed substituent-induced redshifts of lambda(ob) and the reduced sensitivity of lambda (ob) to substitutionuent changes are in accordance with the proposal that significant through-space and -bond electronic interactions exist between the cumyl radical and the Cumyl cation moieties of the 1,4-diphenylcyclohexane-1, 4-diyl radical cation.

TL;DR: It is suggested that a novel rearrangement of 1 to give 2 occurs irreversibly via intermediate 3*+, a radical cation variant of an unprecedented oxa analogue of tetramethyleneethane.

TL;DR: In this article, the authors investigated the reactivity of 4-methylene-3,3-dimethyl-2,2-diphenylcyclobutan-1-one (5) and 4-isopropylidene-2.2-diyl-cyclobunden-1.6 (6) in photo-induced electron transfer, pyrolysis, and direct irradiation reactions.

TL;DR: The 9,10-dicyanoanthracene-sensitized photoreaction of 1-methyl- and 1,1'-dimethyl-2,2',3,3'-tetraphenylbicyclopropenyl gives the corresponding benzene and Dewar benzene derivatives, indicating that their photoinduced electron-transfer bicyclopropanyl-benzene rearrangements proceed via Dewar benzenes.

TL;DR: The results of DFT investigation suggest that C2-C3 bond cleavage of the 2,2-dianisyl-3,3-dimethyl-4-methylenecyclobutanone radical cation (2b + ) is preferred from both a thermodynamic and a kinetic perspective while C1-C2 bond cleaving is both thermodynamically and kinetically favored in the parent MCB + ) as mentioned in this paper.