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–platinum monomer, trans‐(PBu3)2Pt(CCSiMe2–CCH)2 (1). The reaction of platinum poly‐yne polymer 2 with dicobaltoctacarbonyl gave μ‐coordinated complexes, {[CCSiMe2CCPt(PBu3)2CCSiMe2CC] [Co2(Co)6]2}n (4). the electric conductivity of iodine adducts of the polymer complexes 4 was 3.0×10−5 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 SiMe2CC C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 those of 4. All new compounds have been characterized by analytical and spectral analysis (IR, 1H NMR).