SYNTHESIS OF POLY-YNE POLYMER CONTAINING PLATINUM AND SILICON ATOMS IN THE MAIN-CHAIN BY OXIDATIVE COUPLING AND ITS REACTIONS WITH TRANSITION-METAL CARBONYL-COMPLEXES

The platinum poly-yne polymer, (-C=C-SiMe2-C=C-Pt(PBu3)2-C=C-SiMe2-C=C -]n (2), was synthesized by the oxidative coupling of a silicon-platin um monomer, trans-[(PBU3)2Pt(C=C-SiMe2-C=CH)2 (1). The reaction of pla tinum poly-yne polymer 2 with dicobaltoctacarbonyl gave mu-coordinated complexes, C-SiMe2-C=C-Pt(PBU3)2-C=C-SiMe2-C=C-][Co2(CO)612}n (4). th e electric conductivity of iodine adducts of the polymer complexes 4 w as 3.0 x 10(-5) S cm-1. As an aid to spectroscopic characterization of the polymer complex 4, a model complex, {trans[(PBu3)2Pt-(C=C-SiMe2-C =CH)2]} {[Co2(CO)6]2} (3), was also prepared by the reaction of 1 with dicobaltocatacarbonyl. Selective coordination Of Co2(CO)6 groups to - SiMe-C=CC=C-Si(Me)2- moieties and coordinative inertness of the Pt-C=C - moieties were confirmed by comparison of the NMR spectra of 3 with t hose of 4. All new compounds have been characterized by analytical and spectral analysis (IR, H-1 NMR).