HYDROBORATION, HALOBORATION AND PHENYLBORATION POLYMERIZATIONS

A polyaddition between diene and monoalkylborane produced a polymer co nsisting of C-B bonds in the main chain. The resulting oganoboron poly mers can be used as a novel type of reactive polymers. On the other ha nd, hydroboration polymerization of dicyano compounds produced air-sta ble poly(cyclodiborazane)s having B-N four-membered rings via dimeriza tion of iminoborane species. Poly(organoboron halide)s were prepared e ither by haloboration polymerization between diynes and boron tribromi de or by hydroboration polymerization of dienes with monobromoborane. Furthermore, phenylboration polymerization of diynes or diisocyanates gave new organoboron mainchain polymers.