Preparation and chemical and spectroscopic properties of (disilylamino)difluorophosphine and bis(difluorophosphino)silylamine

Abstract

The compounds PF₂[N(SiH₃)₂] and N(PF₂)₂(SiH₃) have been prepared by the reactions of SiBrH₃ and NMe₃ with PF₂[NH(SiH₃)] and NH(PF₂)₂ respectively. Vibrational, n.m.r., mass, and photoelectron spectra have been recorded, and chemical properties have been studied. With diborane, PF₂[N(SiH₃)₂] gives the adduct PF₂[N(SiH₃)₂]·BH₃ and N(PF₂)₂(SiH₃) gives both mono- and bis-(borane) adducts; n.m.r. spectre of the three borane adducts have been recorded. In reactions with HBr the P–N bonds are attacked preferentially, whereas in reactions with water the cleavage of the Si–N bonds takes place first.