An Electrophilic Carbene-Anchored Silylene-Phosphinidene

Abstract

The cyclic alkyl(amino) carbene-anchored silylene-phosphinidene was isolated as L-Si-P(:cAAC-Me) (L=benzamidinate) at room temperature, synthesized from the reduction of L-Si(Cl₂ )-P(:cAAC-Me) (1) using two equivalents of KC₈ . Compound 1 was prepared by the oxidative addition of a chlorophosphinidene to the benzamidinate substituted silylene center. This is the first molecular example of a silylene-phosphinidene characterized by single-crystal X-ray structural analysis. Moreover, ¹ H, ³¹ P, and also ²⁹ Si NMR spectroscopic data supported the formulation of the products. The theoretical calculations of compound 2 are in good agreement with the experimental results.

Keywords: bonding analysis; cyclic alkyl(amino) carbenes; phosphinidenes; silylenes; theoretical calculations.