SYNTHESIS AND CHARACTERIZATION OF GROUP-VB METAL CHLORIDE ADDUCTS OF TRIPHENYLTELLURONIUM CHLORIDE

This paper describes the synthesis and properties of metal chloride (A sCl3, SbCl3, SbCl5 and BiCl3) adducts of triphenyltelluronium chloride . Ph3TeCl.AsCl3, Ph3TeCl.SbCl3, 2Ph3TeCl.SbCl3, 3Ph3TeCl.SbCl3, Ph3TeC l.SbCl5, Ph3TeCl.BiCl3 and 2Ph3TeCl.BiCl3 type products are obtained b y the reactions of triphenyltelluronium chloride with these metal chlo rides. Conductance, cryoscopic and H-1 n.m.r. data are consistent with their dissociation in dilute solution as Ph3Te+ and MCl4- (M = As(III ), Sb(III), Bi(III)) or SbVCl6- for 1:1 type adducts, as Ph3Te+ and MC l5(2-) (M = Sb(III) and Bi(III)) for 2:1 type adducts and as Ph3Te+ an d Sb(III) Cl-6(3-) for 3:1 type adducts. Far i.r. spectra also reflect the formation of chlorometallate species by transfer of chloride ion of Ph3TeCl to the metal chlorides. Thus, the formulations of these add ucts as triphenyltelluronium chlorometallate, i.e. [Ph3Te][AsCl4], (Ph 3Te][SbIIICl4], [Ph3Te]2[SbIIICl5], [Ph3Te]3[SbIIICl6], [Ph3Te][SbVCl6 ], [Ph3Te][BiCl4] and [Ph3Te]2[BiCl5] is proposed.