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

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

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.

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, 43(8), 3339-3346. https://doi.org/10.1039/c3dt53205d

• Journal Article Type: Article
• Acceptance Date: Dec 4, 2013
• Online Publication Date: Dec 4, 2013
• Publication Date: Feb 28, 2014
• Deposit Date: Jun 9, 2015
• Publicly Available Date: Jun 9, 2015
• 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
• DOI: https://doi.org/10.1039/c3dt53205d
• Keywords: Branched polyethylene, Synthesis
• Public URL: https://hull-repository.worktribe.com/output/374936
• 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