SYNTHESIS, SPECTROSCOPIC PROPERTIES AND X-RAY STRUCTURAL-ANALYSIS OF A DINUCLEAR TIN ADDUCT - MU-BIS(DIPHENYLPHOSPHINYL)ETHANEBIS(NITRATOTRIPHENYLTIN)

From the reaction of nitratotriphenyltin with bis(diphenylphosphinyl)ethane, a dinuclear adduct of formula [{SnPh3(NO3)}2{OPPh2(CH2)2Ph2PO}] has been obtained, in which the organic ligand is present in oxidised form. Crystals are triclinic (P1), with unit-cell dimensions: a = 12.519(15), b = 11.798(12), c = 10.399(10) Å, α = 98.2(1), β = 89.2(1), γ = 111.2(1)°, Z = 1. The structure has been determined from diffractometer data by conventional Patterson and Fourier techniques and refined by full-matrix least-squares to an R value of 3.68% for 4291 independent relfections. The adduct has a trigonal bipyramidal coordination geometry with the three phenyl rings occupying equatorial coordination sites, while the unidentate nitrate group and the bis(diphenylphosphinyl)ethane molecule are trans to each other and occuppy the apical positions. © 1978.