Cyclic inorganic compounds. Part IX. Fluorination of bisdimethylaminotetrachlorotriphosphonitrile

Abstract

Substitution of two of the chlorine atoms in cis-(Ia) and trans-1,3-bisdimethylaminotetrachlorotriphosphonitrile (Ib), with potassium fluorosulphite yields the corresponding cis-(IIa) and trans-geminal (5,5) difluorides(IIb). With antimony trifluoride as fluorinating agent, only the chlorine atoms in the 1- and 3-positions are substituted and two further isomeric difluorides,(IIIa) and (IIIb), can be obtained. Structures are proposed on the basis of ¹H and ¹⁹F n.m.r. spectra together with evidence from i.r. spectroscopy. Further fluorination of the 1,3-difluorides (IIIa), and (IIIb) with either potassium fluorosulphite or sodium fluoride gives two isomeric 1,3,5,5-tetrafluorides (IVa) and (IVb).