Modification of bidentate bis(N-heterocyclic imine) ligands for low-valent main group complexes

摘要

The synthesis of modified neutral bis-NHI (NHI is N-heterocyclic imine) ligands and their application for the stabilization of tetryliumylidenes are reported. The ligands' scaffolding consists of either saturated or methylated imidazoline backbones, and the bridge alternated from flexible ethylene to more rigid o-phenylene. Transmetalation reactivity of the cationic Sn-II compounds was tested towa rds LiAlH4 and IDipp -> SiCl2 IDipp is 1,3-bis(2,6-diisopropyl-phenyl)imidazol-2-ylidene affording the respective aluminium and silicon complexes.