Die Dimerisierung von Di(n-butyl)fluorphosphan und seine Reaktion mit Benzaldehyd

The Dimerization of Di(n-butyl)fluorophosphane and its Reaction with Benzaldehyde The phosphorus atom of organylfluorophosphanes possesses electrophilic as well as nucleophilic properties. This dualistic character decisively determines both their disproportionation and their reaction with aldehydes. The phoshanylphoshorane n-Bu₂P? PF₂(n-Bu)₂, 1 b , has been proved to be the intermediat product of the disproportionation of n-Bu₂PF. In the presence of an equimolar amount of Et₃N an equilibrium exists between 1 b and the monomeric n-Bu₂PF. n-Bu₂PF react with benzaldehyde forming the phosphinitophoshorane n-Bu₂P′? O? CHPh? PF₂(n-Bu)₂, 3 a. Reliable information on the reaction pathway has been obtained by means of crossing experiments.