TRIPHENYLTELLURONIUM DERIVATIVES OF DITHIOPHOSPHORUS LIGANDS - CRYSTAL AND MOLECULAR-STRUCTURE OF [PH(3)TE][S(2)PPH(2)] AND [PH(3)TE][(SPPH(2))(2)N], DISPLAYING WEAK CATION-ANION TE-CENTER-DOT-CENTER-DOT-CENTER-DOT-S SECONDARY INTERACTIONS

Triphenyltelluronium diphenylphosphinodithioate, [Ph(3)Te][S(2)PPh(2)] (1) and tetraphenyldithioimidodiphosphinate, [Ph(3)Te][(SPPh(2))(2)N] (2), were obtained by metathesis reaction between Ph(3)TeCl and NH4[S (2)PPh(2)] and K[(SPPh(2))(2)N], respectively, and were characterized by IR, MS and multinuclear NMR. The molecular structure of both compou nds was investigated by X-ray diffractometry. The compounds are monome ric and predominantly ionic in the solid state. The Te...S interatomic distances (3.331 and 3.655 Angstrom in 1, and 3.264 and 3.451 Angstro m in 2 indicate weak cation-anion secondary interactions. In both comp ounds the tellurium atom is five-coordinated, with distorted square-py ramidal geometry. The coordination polyhedron in 2 is less distorted d ue to the flexibility of the SPNPS system and the larger S...S bite of this ligand (4.276 Angstrom in 2, vs 3.368 Angstrom in 1).