Issue 5, 2012
From the journal:

Dalton Transactions

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

Xiaohua Hou,ab   Zhengguo Cai,c   Xia Chen,*a   Lin Wang,b   Carl Redshaw*d  and  Wen-Hua Sun*bc  

* Corresponding authors

a School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, China
E-mail: chenxia@sxu.edu.cn

b Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing, China
E-mail: whsun@iccas.ac.cn
Fax: +86 10 62618239
Tel: +86 10 62557955

c College of Material Science and Engineering & State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai, China

d School of Chemistry, University of East Anglia, Norwich, UK
E-mail: Carl.Redshaw@uea.ac.uk

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 NiCl2 or NiBr2(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 (Et2AlCl), 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.

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

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Article information

DOI
https://doi.org/10.1039/C1DT11766A
Article type
Paper
Submitted
18 Sep 2011
Accepted
31 Oct 2011
First published
08 Dec 2011

Dalton Trans., 2012,41, 1617-1623

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

X. Hou, Z. Cai, X. Chen, L. Wang, C. Redshaw and W. Sun, Dalton Trans., 2012, 41, 1617 DOI: 10.1039/C1DT11766A

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