Upon direct u.v. irradiation in cyclohexane, benzene, alcohol, or chloroform solution, [Sn(CPhCHPh)Me3](1) undergoes cis-trans isomerization about the olefin double bond as the only efficient reaction. No evidence has been found for either homolytic or heterolytic photocleavage of the Sn–C bond as a primary process. Unusually for stilbenes the photostationary state reached on irradiation (313 nm) is
在
环己烷,苯,醇或
氯仿溶液中直接紫外线照射后,[Sn(CPh CHPh)Me 3 ](1)绕烯烃双键进行顺-反异构化是唯一有效的反应。没有证据表明Sn–C键的均相或异相光解是一个主要过程。通常,对于斯蒂芬
苯胺,在辐射(313 nm)处达到的光平稳状态富含反式异构体(在
环己烷中,顺式:反式的比例为27:73),因为顺式的吸收系数更高在该波长下的异构体。来自有机敏化剂的能量转移后,也可能引起异构化。对于[Sn(CPh CMePh)Me 3 ](2)也观察到了相似的结果。