title: Ethylene polymerization by the thermally unique 1-[2-(bis(4-fluoro phenyl)methyl)-4,6-dimethylphenylimino]-2-aryliminoacenaphthylnickel precursors.
abstract: A series of 1-[2-(bis(4-fluorophenyl)methyl)-4,6-dimethylphenylimino]-2-aryliminoacenaphthylene derivatives together with the corresponding nickel bromide complexes was synthesized and characterized. Representative complexes C2 and C5 were characterized by the single-crystal X-ray diffraction, revealing a distorted tetrahedral geometry. Upon activation with either methylaluminoxane (MAO) or ethylaluminum sesquichloride (EASC), all nickel complexes exhibited high activities towards ethylene polymerization, producing polyethylene with a relatively low degree of branching and narrow polydispersity. Complex C1 maintained good activity at elevated reaction temperatures, which indicates significant thermal stability of the active species.
authors.affiliation: Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China. whsun@iccas.ac.cn.
authors.forename: Shizhen
authors.initials: S
authors.lastname: Du
authors.forename: Qifeng
authors.initials: Q
authors.lastname: Xing
authors.forename: Zygmunt
authors.initials: Z
authors.lastname: Flisak
authors.forename: Erlin
authors.initials: E
authors.lastname: Yue
authors.forename: Yang
authors.initials: Y
authors.lastname: Sun
authors.forename: Wen-Hua
authors.initials: WH
authors.lastname: Sun