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Synthesis and characterization of 2-(2-benzhydrylnaphthyliminomethyl)pyridylnickel halides: formation of branched polyethylene

Yue, Erlin; Cao, Xiao Ping; Xing, Qifeng; Sun, Wen Hua; Zhang, Liping; Shi, Qisong; Cao, Xiao-Ping; Wang, Lin; Redshaw, Carl; Sun, Wen-Hua

Authors

Erlin Yue

Xiao Ping Cao

Qifeng Xing

Wen Hua Sun

Liping Zhang

Qisong Shi

Xiao-Ping Cao

Lin Wang

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Professor Carl Redshaw C.Redshaw@hull.ac.uk
Professor of Inorganic Materials Chemistry and REF Lead for Chemistry

Wen-Hua Sun

Abstract

A series of 2-(2-benzhydrylnaphthyliminomethyl)pyridine derivatives (L1–L3) was prepared and used to synthesize the corresponding bis-ligated nickel(II) halide complexes (Ni1–Ni6) in good yield. The molecular structures of representative complexes, namely the bromide Ni3 and the chloride complex Ni6, were confirmed by single crystal X-ray diffraction, and revealed a distorted octahedral geometry at nickel. Upon activation with either methylaluminoxane (MAO) or modified methylaluminoxane (MMAO), all nickel complex pre-catalysts exhibited high activities (up to 2.02 × 10⁷ g(PE) mol⁻¹(Ni) h⁻¹) towards ethylene polymerization, producing branched polyethylene of low molecular weight and narrow polydispersity. The influence of the reaction parameters and the nature of the ligands on the catalytic behavior of the title nickel complexes were investigated.

Journal Article Type Article
Publication Date Feb 28, 2014
Journal Dalton transactions
Print ISSN 1477-9226
Electronic ISSN 1477-9234
Publisher Royal Society of Chemistry
Peer Reviewed Peer Reviewed
Volume 43
Issue 8
Pages 3339-3346
Institution Citation Yue, E., Xing, Q., Zhang, L., Shi, Q., Cao, X., Wang, L., …Sun, W. (2014). Synthesis and characterization of 2-(2-benzhydrylnaphthyliminomethyl)pyridylnickel halides: formation of branched polyethylene. Dalton transactions : an international journal of inorganic chemistry / RSoC, 43(8), 3339-3346. https://doi.org/10.1039/c3dt53205d
DOI https://doi.org/10.1039/c3dt53205d
Keywords Branched polyethylene, Synthesis
Publisher URL http://pubs.rsc.org/en/content/articlelanding/2014/dt/c3dt53205d#!divAbstract
Additional Information : This document is CrossCheck deposited; : Crystal Structure Data; : The Royal Society of Chemistry has an exclusive publication licence for this journal; OPEN ACCESS: The accepted version of this article will be made freely available after a 12 month embargo period; : Received 13 November 2013; Accepted 4 December 2013; Accepted Manuscript published 4 December 2013; Advance Article published 23 December 2013; Version of Record published 28 January 2014

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