PREPARATION AND STRUCTURE OF TRIORGANOTIN AND TRIORGANOLEAD METHYLOXALATES

Article abstract of DOI:10.1016/S0022-328X(00)98928-9

Triorganotin and triorganolead methyloxalates R3MO2CCO2Me (M = Sn, Pb; R = Me, Ph) have been prepared by neutralization of HO2CCO2Me with the appropriate hydroxides.The crystal structure of Ph3PbO2CCO2Me has been determined by single crystal X-ray diffraction.In the chain-like structure the lead atom is in a slightly distorted trigonal bipyramidal environment, with C(phenyl) in the equatorial plane and the O atoms of bridging carboxylate groups in apical positions (Pb-O(1') 256.5(4), Pb-O(2) 238.4(4) pm; O(1')-Pb-O(2) 169.8(1) deg).The distance Pb-O(1) of 342.6(4) pm is taken to indicate a weak chelating interaction.There is no inter-chain coordination.From vibrational spectral data analogous molecular structure are inferred for the other triorganometal methyloxalates.