Preparation and properties of difluorophosphino-derivatives of phosphorus(III) hydroxy-compounds

Abstract

Phosphorus(III) acid reacts rapidly with S(PF₂)₂ to give PHO(OPF₂)₂, and then more slowly to give P(OPF₂)₃. The latter has been isolated, and characterised by n.m.r., vibrational, mass, and u.v. photoelectron spectroscopy. Diphenyl- and dimethyl-phosphites react with S(PF₂)₂ to give P(OPh)₂(OPF₂) and P(OMe)₂(OPF₂). The latter has been isolated, and fully characterised spectroscopically. It reacts rapidly with diborane to give a monoborane adduct, and more slowly to give a bis(monoborane) adduct. Reactions of S(PF₂)₂ with hypophosphorous acid and with diphenylphosphine oxide are also described.