An unprecedented 1,4-diphospha-2,3-disila butadiene (-P&z.dbd;Si-Si&z.dbd;P-) derivative and a 1,3-diphospha-2-silaallyl anion, each stabilized by the amidinate ligand

Abstract

The first acyclic 4π-electron-P&z.dbd;Si-Si&z.dbd;P-motif with two four coordinate silicon substituents supported by the amidinate ligand and two coordinate phosphorus has been synthesized from the reaction of heteroleptic chlorosilylene LSiCl (1), TripPCl2 (Trip = 2,4,6-iPr3C6H2) and KC8 in a 1:1:3 ratio. The same reaction in a 1:2:6 ratio in the presence of one equivalent of 18-crown-6 ether affords the 1,3-diphospha-2-silaallyl anion.