Studies of Photochemical Reactions of 7,8-Digermabicyclo[2.2.2]octadienes by Steady-State and Laser Flash Photolysis Techniques
作者:Kunio Mochida、Takanari Kayamori、Masanobu Wakasa、Hisaharu Hayashi、Mikhail P. Egorov
DOI:10.1021/om000471u
日期:2000.8.1
transient bands of tetraalkyldigermenes using nanosecond laser flash photolysis appeared at ca. 380 nm. The rate constants for the quenching reactions of the digermene with oxygen, polyhalomethanes, alcohols, 2,3-dimethylbuta-1,3-diene, 1-hexyne, and triethylsilane were also measured under various conditions. The quenching reactions of digermenes with carbon tetrachloride and ethanol (k = ∼107 M-1 s-1) are
稳态纳秒激光研究了溶液中1,4-二苯基-2,3-苯并-7,7,8,8-四烷基-7,8-二茂铁双环[2.2.2]辛二烯的光化学快速光解和基质分离技术。溶液中7,8-二茂铁双环[2.2.2]辛二烯的光解作用主要导致三重激发态四烷基二茂铁和1,4-二苯基萘的形成。7,8-二茂铁双环[2.2.2]辛二烯也可以光化学异构化为1,4-二苯基-2,3-苯并-6,6,7,7-四烷基-6,7-二茂铁三环[3.3.0.0]辛烷,次要产品。四烷基二茂铁与丁二烯(2,3-二甲基-1,3-二烯和2-甲基-1,3-二烯的丁二烯),四氯化碳和甲醇的反应产生了相应的Digermene捕获产物:1,2-digermacyclohex-4-烯,1,2-二氯二茂铁和六氯乙烷,和甲氧基二茂铁分别以良好的收率。使用纳秒激光闪光光解法得到的四烷基二硬脂酸酯的瞬态谱带出现在大约。380海里 还在各种条件下测量了地芬烯与氧,多卤代甲烷,