Abstract
Photolysis of 1-azido-1-silabicyclo[2.2.1]heptane and 1-azido-1-silabicyclo[2.2.2.]octane give loss of nitrogen and rearrangement with ring enlargement yielding silaimine reaction intermediates which were trapped by reaction with methyltrimethoxysilane and triethoxysilane. Evidence is presented which indicates that the unsaturated siliconnitrogen bonds in the intermediates have considerable polar character and do not behave like triplet diradicals. The balance of the evidence favors, but does not completely prove, that the intermediates have significant π-bonding.
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