Zur Reaktion zwischen Bortrifluorid und tertiären Phosphiten / The Reaction between Boron Trifluoride and Tertiary Phosphites : Darstellung von Mono- und Difluorphosphiten / Preparation of Mono- and Difluorophosphites

BF₃ reacts at 0° with tertiary phosphites, P(OR)₃, stepwise to give mono- and difluorophosphites, FP(OR)s and F₂P(OR), by ligand exchange. A new method for the preparation of monoand difluorophosphites is described. ³¹P and ¹¹B N.M.R. spectra are reported.