Phosphorus–fluorine compounds. Part XI. Further studies on alkylaminodifluorophosphines

Abstract

Secondary amines react with difluorotrichloromethylphosphine–molybdenum carbonyl complexes (CCl₃PF₂)_nMo(CO)_6–n(n= 2,3) to give chloroform and the corresponding dialkylaminodifluorophosphine–molybdenum carbonyl complexes (R₂NPF₂)_nMo(CO)_6–n. Evidence for co-ordination via phosphorus rather than nitrogen in these complexes is discussed. Methylaminodifluorophosphine CH₃NHPF₂ has been synthesised by two routes: (a) primary aminolysis of difluorotrichloromethylphosphine and (b) equilibration between methylamine and methylaminobisdifluorophosphine CH₃N(PF₂)₂. ³¹P, ¹⁹F, and ¹H n.m.r. spectra are presented and discussed.