2-[1-(2,6-dibenzhydryl-4-chlorophenylimino)ethyl]-6-[1-aryliminoethyl] pyridyl cobalt dichlorides: Synthesis, characterization and ethylene polymerization behavior

He, Fan; Zhao, Weizhen; Cao, Xiao Ping; Liang, Tongling; Redshaw, Carl; Sun, Wen Hua

Abstract

A series of 2-[1-(2,6-dibenzhydryl-4-chlorophenylimino)ethyl]-6-[1- aryliminoethyl]pyridyl cobalt(II) dichloride complexes (Co1-Co5) were prepared and characterized by elemental and spectroscopic analysis. The molecular structures of the representative cobalt complexes Co1 and Co4 were determined by single-crystal X-ray diffraction, and revealed a pseudo-square-pyramidal geometry around each cobalt atom. Upon activation with either MMAO or MAO, all cobalt pre-catalysts exhibited high activities toward ethylene polymerization and produced polyethylene products with narrow molecular distributions (1.98-3.61) and molecular weights in the range 72.3-665 kg/mol; the latter is higher than any other molecular weight of polyethylenes obtained by previous cobalt pre-catalysts. Reaction parameters and the nature of the ligands were investigated for their influence on the resultant catalytic activities and properties of the polyethylene products obtained. © 2012 Elsevier B.V. All rights reserved.

Citation

He, F., Zhao, W., Cao, X. P., Liang, T., Redshaw, C., & Sun, W. H. (2012). 2-[1-(2,6-dibenzhydryl-4-chlorophenylimino)ethyl]-6-[1-aryliminoethyl] pyridyl cobalt dichlorides: Synthesis, characterization and ethylene polymerization behavior. Journal of organometallic chemistry, 713, 209-216. https://doi.org/10.1016/j.jorganchem.2012.05.020

• Journal Article Type: Article
• Acceptance Date: May 20, 2012
• Online Publication Date: May 26, 2012
• Publication Date: Aug 15, 2012
• Deposit Date: Jun 8, 2022
• Journal: Journal of Organometallic Chemistry
• Print ISSN: 0022-328X
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 713
• Pages: 209-216
• DOI: https://doi.org/10.1016/j.jorganchem.2012.05.020
• Public URL: https://hull-repository.worktribe.com/output/3622206