Behavior of Biradicals Generated from a Norrish Type-I Reaction of 2,2-Diphenylcycloalkanones. Chain-Length Dependence and Magnetic Field Effects
作者:Itsuko Suzuki、Ryoko Tanaka、Akinori Yamaguchi、Shin-ichiro Maki、Hiroaki Misawa、Katsumi Tokumaru、Ryoichi Nakagaki、Hirochika Sakuragi
DOI:10.1246/bcsj.72.103
日期:1999.1
derived from CK-9 was studied in detail; the photolysis of CK-9 afforded an open-chain and a cyclic decarbonylation product together with an unsaturated aldehyde and a 4-methylene-2,5-cyclohexadienyl ketone (a pre-cyclophane). The photolysis of this ketone gave the same products that arose from the photolysis of CK-9, presenting the possibility that the decarbonylation products and a part of the aldehyde
酰基-二苯基甲基双自由基(α-氧代-ω,ω-二苯基-α,ω-烷二基双自由基)的反应过程,O=C↑-(CH2)n-2-C↑Ph2 (3BR-n),生成自具有不同环尺寸的 2,2-二苯基环烷酮 (CK-n) 在甲醇中的 Norrish I 型反应从分子内歧化 (n = 6, 7) 转换为二苯基链烯醛,转为酰基苯基重组 (n ≥ 9 ),得到环烷衍生物。详细研究了来源于CK-9的3BR-9的行为;CK-9 的光解提供了开链和环状脱羰产物以及不饱和醛和 4-亚甲基-2,5-环己二烯基酮(前环芳烷)。该酮的光解产生与 CK-9 光解相同的产物,提出了脱羰产物和部分醛在辐照过程中作为副产物形成的可能性。分别测量了由 CK-12 和 13 产生的 3BR-n(n = 12 和 13)的寿命的磁场依赖性......