Photochemical Reactions of Aromatic Compounds. XLII. Photosensitized Reactions of Some Selected Diarylcyclobutanes by Aromatic Nitriles and Chloranil. Implications of Charge-Transfer Contributions on Exciplex Reactivities
作者:Chyongjin Pac、Tomohito Ohtsuki、Yozo Shiota、Shozo Yanagida、Hiroshi Sakurai
DOI:10.1246/bcsj.59.1133
日期:1986.4
excitation-resonance contributions of exciplex intermediates. The reaction efficiencies increase with an increase in the electron-accepting power of the sensitizers irrespective of the spin states. The formation of 1-phenyltetralin in the photosensitized reactions of the diphenylcyclobutanes occurs from the polar singlet exciplex with the dicyanoarenes but not at all from the less polar exciplex with
顺式和反式 1,2-二苯基环丁烷和顺式反式顺式环丁烷[1,2-a : 4,3-a']二茚与 1-氰基萘、9,10-二氰基蒽、1,4 的光敏反应-二氰萘和氯苯醌,主要产生开环产物(苯乙烯或茚),已被研究以探索与激基复合物中间体的电荷转移和激发共振贡献相关的反应的空间和电子要求。无论自旋状态如何,反应效率都随着敏化剂的电子接受能力的增加而增加。在二苯基环丁烷的光敏反应中,1-苯基四氢萘的形成是由与二氰基芳烃的极性单线态激基复合物形成的,但根本不是来自与 1-氰基萘的极性较小的激基复合物,也不是来自高电荷转移性质的三线态氯苯醌激基复合物。根据电荷转移贡献在激态复合体衰变通道中的作用以及…