Sterically congested cis-2-(t-butyl)-3-(organosilyl)cyclohexanones were irradiated with UV light to give a mixture of Norrish type I and II products, as well as the corresponding trans-2-(t-butyl)-3-(organosilyl)cyclohexanones. In comparison with the trans isomers, the quantum yields and rate constants of the photolytic reactions were greater for the cis isomers.
用紫外光辐照立体异构化的顺式-2-(叔丁基)-3-(有机甲
硅烷基)
环己酮,得到Norrish I和II型产物的混合物以及相应的反式-2-(叔丁基)- 3-(有机甲
硅烷基)
环己酮。与反式异构体相比,顺式异构体的光解反应的量子产率和速率常数更大。