Ethylene-norbornene copolymerization by new titanium complexes bearing tridentate ligands. Sidearm effects on catalytic activity

Gao M; Wang C; Sun X; Qian CT; Ma Z; Bu SH; Tang Y; Xie ZW

Macromolecular Rapid Communications, Vol.28, No.15, 1511-1516, 2007

DOI10.1002/marc.200700305 Export Citation

Ethylene-norbornene copolymerization by new titanium complexes bearing tridentate ligands. Sidearm effects on catalytic activity

Gao M, Wang C, Sun X, Qian CT, Ma Z, Bu SH, Tang Y, Xie ZW

The Ti complexes containing tridentate [(O-NSR)] (R = Pr-i) ligands with alkylthio sidearms were prepared. The methylthio ether complex (R = Me shown in the Scheme) exhibits an excellent activity for copolymerization of ethylene with norbornene upon activation with MMAO, which is 10 times more active than the corresponding phenylthio one (R = Ph).

Keywords:catalyst;copolymerization;group 4 metal;norbornene;olefin