X-ray Crystallographic Analysis of a 3-Silacyclopropene with Electronegative Substituents on Silicon

Abstract

X-ray crystallographic analysis of 3,3-bis(diisopropylamino)-1,2-bis(trimethylsilyl)-3-silacyclopropene (1) gave the first experimental evidence for significant substituent effects on the ring structure deformation due to the interaction between the π-type σ*-orbital of silicon−nitrogen bonds and the CC π-bonding orbital. The degree of bond deformation in 1 was estimated by electron density distribution in the ring plane.