N-(5,6,7-Trihydroquinolin-8-ylidene)-2-benzhydrylbenzenaminonickel halide complexes: Synthesis, characterization and catalytic behavior towards ethylene polymerization

Hou, Xiaohua; Cai, Zhengguo; Chen, Xia; Wang, Lin; Redshaw, Carl; Sun, Wen Hua

Abstract

A series of N-(5,6,7-trihydroquinolinylidene)-2-benzhydrylbenzenamine ligands was synthesized and characterized by 1H/ 13C NMR and IR spectroscopy, and by elemental analysis. These ligands reacted with NiCl 2 or NiBr 2(DME) to form the title halide complexes, which were also characterized by IR spectroscopy and elemental analysis. Single crystal X-ray diffraction revealed that the representative nickel complexes crystallized as centro-symmetric dimers with chloro-bridges linking distorted octahedral nickel centers. On activation with either methylaluminoxane (MAO) or diethylaluminium chloride (Et 2AlCl), all nickel pre-catalysts showed high activities for ethylene polymerization, producing polyethylene with narrow molecular weight distribution, consistent with single-site catalysis. The nature of the ligands and reaction parameters were investigated and discussed in terms of their influence on the catalytic behavior of these nickel pre-catalysts.

Citation

Hou, X., Cai, Z., Chen, X., Wang, L., Redshaw, C., & Sun, W. H. (2012). N-(5,6,7-Trihydroquinolin-8-ylidene)-2-benzhydrylbenzenaminonickel halide complexes: Synthesis, characterization and catalytic behavior towards ethylene polymerization. Dalton Transactions : an international journal of inorganic chemistry, 41(5), 1617-1623. https://doi.org/10.1039/c1dt11766a

• Journal Article Type: Article
• Acceptance Date: Oct 31, 2011
• Online Publication Date: Dec 8, 2011
• Publication Date: Feb 7, 2012
• Deposit Date: Jun 8, 2022
• Journal: Dalton Transactions
• Print ISSN: 1477-9226
• Electronic ISSN: 1477-9234
• Publisher: Royal Society of Chemistry
• Peer Reviewed: Peer Reviewed
• Volume: 41
• Issue: 5
• Pages: 1617-1623
• DOI: https://doi.org/10.1039/c1dt11766a
• Public URL: https://hull-repository.worktribe.com/output/3622282