LAUSR

Abstract Treatment of [Os 3 (CO) 10 (NCMe) 2 ] with an equimolar amount of 4-vinylpyridine, 4-ethynylpyridine and 4-ethylpyridine at room temperature readily gave the cluster complexes [Os 3 ( μ -H)(CO) 10 ( μ -NC 5 H 3 CH = CH 2 )] 1 , [Os 3 (μ-H)(CO) 10 (μ-NC 5 H 3 C≡CH)] 2 and [Os 3 (CO) 10 (μ-H)(μ-NC 5 H 3 CH 2 CH 3 )] 3 , respectively. The corresponding ruthenium analogue of 1 , [Ru 3 (μ-H)(CO) 10 (μ-NC 5 H 3 CH = CH 2 )] 4 , was also prepared in good yield by thermal reaction of Ru 3 (CO) 12 with 4-vinylpyridine. Then, five thermally stable polymer-immobilized clusters of osmium 5 – 9 have been synthesized by the solution copolymerization of triosmium cluster-based monomers 1 and 2 with styrene, methyl methacrylate, vinylferrocene and 4-vinylphenylboronic acid, respectively, in the presence of α,α′-azobis(isobutyronitrile) (AIBN) in chloroform at 60 °C. Characterization of all new compounds was achieved by a combination of FTIR, NMR, MS, GPC, electronic absorption and thermal gravimetric analysis techniques. Crystal structure determinations were also carried out for complexes 1 , 3 and 4 .