Dimethyltris(trifluoromethyl)phosphorane, Me2P(CF3)3 and trimethylbis-(trifluoromethyl)phosphorane, Me3P(CF3)2; stable monofunctionally substituted penta-alkyl phosphoranes
Abstract
The new, stable, penta-alkyl phosphoranes (CF3)3PMe2 and (CF3)2PMe3 are, according to n.m.r. spectral evidence, trigonal bipyramidal molecules, probably non-fluxional, in which CF3 groups are found to be preferentially located in the axial positions.