PREPARATION AND PROPERTIES OF DIFLUOROPHOSPHINO(TETRAFLUOROPHOSPHORANYL)AMINE

The compound NH(PF2)(PF4) has been prepared from PF2[NH(SiH3)] by reaction with PF5. Vibrational, photoelectron, n.m.r., and mass spectroscopic data have been recorded, and interpreted in terms of the probable structure and conformation of the molecule. At low temperatures the phosphorus(V) group has chemically equivalent equatorial fluorine atoms but non-equivalent axial atoms, indicating restricted rotation about the P–N bond as well as restricted pseudo-rotation. At high temperatures, all four fluorine atoms are equivalent.