Ethylene polymerization by 2-iminopyridylnickel halide complexes: Synthesis, characterization and catalytic influence of the benzhydryl group

Sun, Wen Hua; Song, Shengju; Li, Baixiang; Redshaw, Carl; Hao, Xiang; Li, Yue Sheng; Wang, Fosong

Abstract

A series of 2-(2-benzhydrylbenzenamino)pyridine ligands (L1-L13) was synthesized and used as bidentate N^N ligands with nickel halides to afford the corresponding nickel dihalide complexes L2Ni2Cl 4C1-C13 and L2NiBr2D1-D13. All ligands and complexes were characterized by IR and NMR spectroscopy, and by elemental analysis. The molecular structures of the representative complexes C1·2CH3OH, C5·2H2O, D4, D7 and D9 were confirmed by single-crystal X-ray diffraction studies. Upon activation with either methylaluminoxane (MAO) or ethylaluminium sesquichloride (Et 3Al2Cl3, EASC), these nickel pre-catalysts exhibited high activities (up to the range of 107 g mol-1 (Ni) h-1) towards ethylene polymerization, producing branched polyethylenes with narrow polydispersity. © 2012 The Royal Society of Chemistry.

Citation

Sun, W. H., Song, S., Li, B., Redshaw, C., Hao, X., Li, Y. S., & Wang, F. (2012). Ethylene polymerization by 2-iminopyridylnickel halide complexes: Synthesis, characterization and catalytic influence of the benzhydryl group. Dalton Transactions : an international journal of inorganic chemistry, 41, 11999-12010. https://doi.org/10.1039/c2dt30989k

• Journal Article Type: Article
• Publication Date: Oct 21, 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
• Pages: 11999-12010
• DOI: https://doi.org/10.1039/c2dt30989k
• Public URL: https://hull-repository.worktribe.com/output/3622159