Base-stabilized silaimine and its donor-free dimer derived from the reaction of NHC-supported silylene with SiCl4

Abstract

Reaction of the N-heterocyclic carbene (NHC)-stabilized silylene ArN(SiMe₃)Si(IiPr)Cl (1, Ar = 2,6-iPr₂C₆H₃, IiPr = 1,3-diisopropyl-4,5-dimethyl-imidazol-2-ylidene) with SiCl₄ resulted in the formation of three different products NHC-stabilized dichlorosilaimine ArNSi(IiPr)Cl₂ (2), aminotrichlorosilane ArN(SiMe₃)SiCl₃ (3) and a silaimine dimer (ArNSiCl₂)₂ (4) under different conditions. The products can be controlled by reaction conditions. Compound 2 is the first example of a less bulky NHC-supported silaimine via the reaction of a silylene with SiCl₄.