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RESEARCH ARTICLE
Contents Vol 63(1)

2-(1H-2-Benzimidazolyl)-6-(1-(arylimino)ethyl)pyridylnickel Complexes: Synthesis, Characterization, and Ethylene Oligomerization

Liwei Xiao A , Min Zhang B , Rong Gao B , Xiaoping Cao A C and Wen-Hua Sun A B C
+ Author Affiliations
- Author Affiliations

A State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China.

B Key Laboratory of Engineering Plastics, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.

C Corresponding authors. Email: caoxplzu@163.com; whsun@iccas.ac.cn

Australian Journal of Chemistry 63(1) 109-115 https://doi.org/10.1071/CH09168
Submitted: 22 March 2009  Accepted: 23 June 2009   Published: 8 January 2010

Abstract

A series of tridentate N,N,N-nickel complexes bearing 2-(1H-2-benzimidazolyl)-6-(1-(arylimino)ethyl)pyridines was synthesized and characterized by elemental and IR spectroscopic analysis. The molecular structures of representative complexes were determined by single-crystal diffraction, and these were found to have a six-coordinate distorted octahedral geometry around the Ni centre. On treatment with Et2AlCl, all nickel complexes exhibited good catalytic activities up to 106 g mol–1(Ni) h–1 for ethylene oligomerization with major dimerization. The steric and electronic effects on catalytic activities of metal complexes as well as the influence of various reaction parameters were carefully investigated.


Acknowledgements

This work was supported by NSFC No. 20674089 and 20621091.


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