Organophosphazenes. 23. The Reactions of (4-(α-Methylethenyl)phenyl, 2-Phenylethynyl)tetrafluorocyclotriphosphazene–Styrene Copolymers with Dicobalt Octacarbonyl1

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The geminal and nongeminal isomers of {rm N}_3{rm P}_3{rm F}_4({rm C}tbond{rm CC}_6{rm H}_5){rm C}_6{rm H}_4rm C({rm CH}_3)dbond{rm CH}_2 undergo radical addition polymerization with styrene to produce copolymers having pendant cyclophosphazenes containing a phenylethynl substituent. Reactions of the copolymer derived from the non-geminal phosphazene derivative with dicobalt octacarbonyl leads to formation of an organometallic cluster, -{rm C}tbond{rm CC}_6{rm H}_5cdot{rm Co}_2({rm CO})_6, as a phosphazene substituent. The redox active nature of the copolymer with the organometallic substituent was confirmed by observation of a one electron reversible reduction using cyclic voltametry. TGA studies suggest that the free alkyne substituent contributes to cross-linking in thermal degradation processes.

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