The photochemical reaction of benzoyltrimethylsilane with organosilicon hydrides

Photolysis of benzoyltrimethylsilane in various hydrosilanes was investigated. It was found that the benzoylsilane was subjected to photoisomerization under neutral conditions to give an open-chain siloxycarbene intermediate which was inserted into the siliconhydrogen bond of hydrosilanes, yielding a new type of compounds (III). The verification of the nature of the new reaction by means of a series of competition photolyses in hydrosilanes showed that the attacking species toward hydrosilanes has nucleophilic and almost ionic character.