Organophosphazenes.: 23.: The reactions of (4-(α-methylethenyl)phenyl, 2-phenylethynyl)tetra-fluorocyclotriphosphazene-styrene copolymers with dicobalt octacarbonyl

The geminal and nongeminal isomers of N3P3F4(C=CC6H5)C6H4C(CH3)-=CH2 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, -C=CC6H5. Co-2(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.