2-(1-(Arylimino)propyl)quinolin-8-olate half-titanocene dichlorides: Synthesis, characterization and ethylene (co-)polymerization behaviour

Huang, Wei; Sun, Wen Hua; Redshaw, Carl

Abstract

A series of 2-(1-(arylimino)propyl)quinolin-8-olate half-titanocene dichlorides, Cp′TiCl2L (Cp′ = η5-C 5H5 or η5-C5Me5, L = 2-(1-(2,6-R1-4-R2-phenylimino)propyl)quinolin-8-olate), was synthesized via the stoichiometric reaction of Cp′TiCl3 with the corresponding potassium 2-(1-(2,6-R1-4-R2- phenylimino)propyl)quinolin-8-olate salt. All titanium compounds were characterized by elemental analysis, 1H NMR and 13C NMR spectroscopy; the molecular structures of two representative compounds were determined by single crystal X-ray diffraction. On activation with methylaluminoxane (MAO), all half-titanocene compounds showed high activity in ethylene polymerization, and furthermore, performed with good to high activities in the co-polymerization of ethylene with either 1-hexene or 1-octene affording polyethylenes with high co-monomer incorporation. Less bulky ortho-substituents (R1) on the phenylimino groups were found to enhance the catalytic activities of their titanium compounds. In general, the titanium pro-catalysts containing η5-C5Me5 (C7-C12) exhibited higher activities than did their analogues bearing η5-C 5H5 (C1-C6). Some of the resultant polyolefins were ultrahigh molecular weight polyethylene. © 2011 The Royal Society of Chemistry.

Citation

Huang, W., Sun, W. H., & Redshaw, C. (2011). 2-(1-(Arylimino)propyl)quinolin-8-olate half-titanocene dichlorides: Synthesis, characterization and ethylene (co-)polymerization behaviour. Dalton Transactions : an international journal of inorganic chemistry, 40(25), 6802-6809. https://doi.org/10.1039/c1dt10068h

• Journal Article Type: Article
• Acceptance Date: Apr 12, 2011
• Online Publication Date: May 19, 2011
• Publication Date: Jul 7, 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: 25
• Pages: 6802-6809
• DOI: https://doi.org/10.1039/c1dt10068h
• Public URL: https://hull-repository.worktribe.com/output/3622419