title: Ethylene polymerisation and ethylene/norbornene copolymerisation by using aryloxo-modified vanadium(V) complexes containing 2,6-difluoro-, dichloro-phenylimido complexes.
abstract: Aryloxo-modified vanadium(V) dichloride complexes containing a dichloro- or difluoro-phenylimido ligand of the type, V(N-2,6-X2C6H3)Cl2(O-2,6-R2C6H3) [X = Cl (1), F (2); R = Me (a), F (b)], showed remarkable catalytic activity in ethylene polymerisation and the copolymerisation with norbornene (NBE) in the presence of Et2AlCl; the activities were higher than that of V(N-2,6-Me2C6H3)Cl2(O-2,6-Me2C6H3) reported previously. Complex 1a is a suitable catalyst precursor in terms of not only the activity, but also synthesis of high molecular weight copolymers with both unimodal molecular weight distributions and uniform compositions.
authors.affiliation: Department of Chemistry, Graduate School of Science and Engineering, Tokyo Metropolitan University, 1-1 Minami Osawa, Hachioji, Tokyo 192-0397, Japan. ktnomura@tmu.ac.jp.
authors.forename: Nichabhat
authors.initials: N
authors.lastname: Diteepeng
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: Tang
authors.forename: Xiaohua
authors.initials: X
authors.lastname: Hou
authors.forename: Yue-Sheng
authors.initials: YS
authors.lastname: Li
authors.forename: Khamphee
authors.initials: K
authors.lastname: Phomphrai
authors.forename: Kotohiro
authors.initials: K
authors.lastname: Nomura