Acceptor properties of some o-phenylenedioxy-derivatives of phosphorus(V) chloride

Abstract

The acceptor properties of PCl₃(cat) and PCl(cat)₂(cat = O₂C₆H₄) towards some Lewis bases have been investigated in solution by means of ³¹P n.m.r. spectroscopy. The compound PCl₃(cat) is a better acceptor than PCl(cat)₂, which is comparable with PPhCl₂ studied previously. The cations [PCl₂(cat)]⁺ and [P(cat)₂]⁺ have been prepared for the first time; these species are extremely reactive, probably because of their strained geometries, and readily increase their co-ordination number. Several new solid complexes have been isolated, and further characterised by elemental analysis, i.r., and in some cases ³¹P n.m.r. and/or ³⁵Cl n.q.r. spectroscopy.