Processus concurrents de photoisomerisation d'hexatrienes polymethyles: effet de longueur d'one
作者:P. Courtot、R. Rumin
DOI:10.1016/0040-4020(76)80060-9
日期:1976.1
orientation of the photochemical reactions of two hexatrienes. A pronounced wavelength effect is observed for Z-2,6-dimethyl-1,3,5-heptatriene; photocycloaddition leads to a bicyclo[3.1.0]hexene and [1,5] sigmatropic hydrogen migration occurs from an s-cis-s-trans conformation preferentially excited by longer wavelength light, whereas the Z-E interconversion is predominantly observed as a result of
示出了基态构象异构体组成在两种己三烯的光化学反应的取向中起决定性作用。对于Z -2,6-二甲基-1,3,5-庚三烯,观察到明显的波长效应。光环加成导致双环[3.1.0]己烯和[1,5]σ氢迁移是由较长波长的光优先激发的s-顺式-s-反式构型引起的,而ZE的相互转化主要是激发的结果的s反式-S-反式由较短波长的光的构象。