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2-[1-(2,6-Dibenzhydryl-4-methylphenylimino)ethyl]-6-[1-(arylimino)ethyl] pyridylcobalt(ii) dichlorides: Synthesis, characterization and ethylene polymerization behavior

Yu, Jiangang; Huang, Wei; Wang, Lin; Redshaw, Carl; Sun, Wen Hua

Authors

Jiangang Yu

Wei Huang

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 unsymmetrical 2,6-bis(imino)pyridylcobalt(ii) complexes, {2-[2,6-(CH(C6H5)2)2-4-Me-C 6H2NC(CH3)]-6-(2,6-R12-4-R2-C6H2NCCH3)-C 5H3NCoCl2} where R1 = Me, Et or iPr, R2 = H or Me, together with the new symmetrical complex 2,6-[2,6-(CH(C6H5)2) 2-4-Me-C6H2NC(CH3)] 2-C5H3NCoCl2, were synthesized. All of the compounds were fully characterized by 1H NMR and IR spectroscopy, as well as by elemental analysis. The molecular structures of Co1 (R1 = Me, R2 = H) and Co5 (R1 = Et, R 2 = Me) were further confirmed by single crystal X-ray diffraction, which indicated that the cobalt centres were penta-coordinate with a pseudo square-pyramidal geometry. Upon treatment with MAO or MMAO, these cobalt pre-catalysts exhibited higher activities than any previously reported cobalt pre-catalysts, with values as high as 4.64 × 106 g PE mol -1(Co) h-1 for ethylene polymerization at atmospheric pressure. The polyethylenes obtained were of high molecular weight and narrow molecular weight distribution. © The Royal Society of Chemistry 2011.

Citation

Yu, J., Huang, W., Wang, L., Redshaw, C., & Sun, W. H. (2011). 2-[1-(2,6-Dibenzhydryl-4-methylphenylimino)ethyl]-6-[1-(arylimino)ethyl] pyridylcobalt(ii) dichlorides: Synthesis, characterization and ethylene polymerization behavior. Dalton Transactions : an international journal of inorganic chemistry, 40(39), 10209-10214. https://doi.org/10.1039/c1dt11062d

Journal Article Type Article
Acceptance Date Aug 2, 2011
Online Publication Date Sep 12, 2011
Publication Date Oct 21, 2011
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 40
Issue 39
Pages 10209-10214
DOI https://doi.org/10.1039/c1dt11062d
Public URL https://hull-repository.worktribe.com/output/3622363