N-fluorsilyl-phosphinimine,darstellung und eigenschaften

Numerous N-fluorosilyl triorganophosphine imines of the general formula R₃P=N-Si(CH₃)_3-nF_n have been prepared by two different routes, (a) by trans-silylation of the corresponding N-trimethylsilyl compounds with fluorosilanes, and (b) by the reaction of N-chlorosilyl phosphine imines with sodium fluoride, and characterized by IR and NMR spectra, elemental analyses, and molecular weight determinations. In solution all these compounds are monomeric, but in the solid state two of these phosphine imines are dimers containing pentacoordinated silicon atoms.