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, [CCSiMe 2 CCPt(PBu 3 ) 2 CCSiMe 2 CC] n (2), was synthesized by the oxidative coupling of a silicon–platinum monomer, trans ‐(PBu 3 ) 2 Pt(CCSiMe 2 –CCH) 2 (1). The reaction of platinum poly‐yne polymer 2 with dicobaltoctacarbonyl gave μ‐coordinated complexes, {[CCSiMe 2 CCPt(PBu 3 ) 2 CCSiMe 2 CC] [Co 2 (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 ‐[(PBu 3 ) 2 Pt(CCSiMe 2 CCH) 2 ]} {[Co 2 (CO) 6 ] 2 } (3), was also prepared by the reaction of 1 with dicobaltocatacarbonyl. Selective coordination of Co 2 (CO) 6 groups to SiMe 2 CC CCSi(Me) 2 Moieties and coordinative inertness of the PtCC 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, 1 H NMR).