Some novel phosphoranides containing pentafluorophenyl groups
Abstract
Several novel phosphoranides containing pentafluorophenyl groups, of formulae [P(C6F5)X2Y]–(X = Cl, Y = Cl, Br, or I; X = Br, Y = Br or I; X = NCS, Y = Cl, Br, I, or NCS) or [P(C6F5)2X(Y)]–(X = Cl, Y = Cl, Br, or I; X = Br, Y = Br or I; X = CN, Y = Cl, Br, I, or NCS) have been identified in solution by means of 31P n.m.r. spectroscopy. Most of the species have been isolated as salts with tetra-alkylammonium ions, and further characterised by elemental analysis and (in some cases) i.r. spectroscopy. These ions {apart from [P(C6F5)2(CN)Y]–} represent the first simple phosphoranides with an organo-group attached to phosphorus and no cyano-groups present. The species with two pentafluorophenyl groups are the first phosphoranides with two organo-groups directly bound to phosphorus. No acceptor properties towards halide ions were shown by P(CCl3)Cl2 or P(C6F5)2(NCS).