Synthesis, characterization and catalytic behavior toward ethylene of 2-[1-(4,6-dimethyl-2-benzhydrylphenylimino)ethyl]-6-[1-(arylimino)ethyl] pyridylmetal (iron or cobalt) chlorides

Wang, Shaoli; Li, Baixiang; Liang, Tongling; Redshaw, Carl; Li, Yuesheng; Sun, Wen Hua

Abstract

A series of 2-[1-(4,6-dimethyl-2-benzhydrylphenylimino)ethyl]-6-[1- (arylimino)ethyl]pyridines was synthesized and used to prepare the iron(ii) and cobalt(ii) chloride complexes thereof. All organic compounds were fully characterized by elemental analysis, IR and NMR (1H/13C) spectroscopy, whilst the metal complexes were characterized by elemental analysis and IR spectroscopy as well as by single-crystal X-ray diffraction studies (for two representative cobalt complexes), which revealed that the geometry at the metal was either pseudo-square-pyramidal or trigonal bipyramidal. Upon activation with either methylaluminoxane (MAO) or modified methylaluminoxane (MMAO), all metal complex pre-catalysts exhibited high activities for ethylene polymerization. The iron pre-catalysts show much higher activity than did their cobalt analogues; however, the iron catalytic systems generally produced polyethylene of wide molecular weight polydispersity. At elevated reaction temperature, the polyethylene was of lower molecular weight, but revealed narrow polydispersity. © 2013 The Royal Society of Chemistry.

Citation

Wang, S., Li, B., Liang, T., Redshaw, C., Li, Y., & Sun, W. H. (2013). Synthesis, characterization and catalytic behavior toward ethylene of 2-[1-(4,6-dimethyl-2-benzhydrylphenylimino)ethyl]-6-[1-(arylimino)ethyl] pyridylmetal (iron or cobalt) chlorides. Dalton Transactions : an international journal of inorganic chemistry, 42(25), 9188-9197. https://doi.org/10.1039/c3dt00011g

• Journal Article Type: Article
• Acceptance Date: Mar 12, 2013
• Online Publication Date: Mar 12, 2013
• Publication Date: Jul 7, 2013
• 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: 42
• Issue: 25
• Pages: 9188-9197
• DOI: https://doi.org/10.1039/c3dt00011g
• Public URL: https://hull-repository.worktribe.com/output/3621982