in tetrahydrofuran byproducts: Pb2(C6H5)6, LiCl; Ph3PbLi in THF added to a slight excess of Ph3SnCl in THF at - 50 degree.C under N2 within 30 min, stirred at -30 degree.C for 1 h, then at -78 degree.C to freeze out.; Filtered with suction (in air), dried in vac.; dissolved in CHCl3, filtered, light petroleum added; elem. anal., MS, IR, NMR, Raman, X-ray structure.;