UEBER GEMISCHTE BINDUNGEN IN DER IV. HAUPTGRUPPE I. HEXAPHENYLETHAN-ANALOGA Ph3Pb-MPh3, M = Pb, Sn, Ge, Si

Article abstract of DOI:10.1016/0022-328X(84)80356-3

The reaction of Ph3PbLi with Ph3SnCl or Ph3GeCl gives Ph3Pb-SnPH3 and Ph3Pb-GePh3, respectively; there is no reaction with Ph3SiCl, PhSiLi reacts with Ph3PbCl to form a regular 1:1 Pb2Ph6*Si2Ph6 phase.The compounds have been investigated by mass, NMR and vibrational spectra: 207Pb NMR chemical shifts with respect to PbMe4 -79.8 (Pb2Ph6), -256.5 (Ph3Pb-SnPh3), -271.5 ppm (Ph3Pb-GePh3); stetching vibrations 112 (Pb-Pb), 125 (Pb-Sn), 138 cm^-1 (Pb-Ge).The crystal structures have been determined and refined to R = 0.061 (Ph3Pb-SnPh3, -40 deg C), 0.053 (Ph3Pb-GePh3, -50 deg C), 0.068 (Pb2Ph6*Si2Ph6, 20 deg C); bond lengths 285 (Pb-Pb), 283 (Pb-Sn), 262 pm (Pb-Ge).