Half-titanocene 5-t-butyl-2-(1-(arylimino)methyl)quinolin-8-olate chlorides: Synthesis, characterization and ethylene (co-) polymerization behavior

Redshaw, Carl; Chen, Langqiu; Sun, Wen-Hua; Wang, Lin; Yan, Qing; Yang, Wenhong

Abstract

A series of half-titanocene chloride complexes bearing 5-t-butyl-2-(1-(arylimino)methyl)quinolin-8-olate ligands (L), CpTiLCl₂, has been synthesized in acceptable yields by the stoichiometric reaction of CpTiCl₃ with the respective potassium 5-t-butyl-2-(1-(arylimino)methyl)quinolin-8-olate. All half-titanocene complexes were fully characterized by elemental analysis and NMR spectroscopy, and the molecular structures of the representative complexes C1 and C2 were confirmed as pseudo octahedral at titanium by single-crystal X-ray diffraction. When activated with methylaluminoxane (MAO) or modified methylaluminoxane (MMAO), all titanium complexes exhibited good activities (up to 4.8 × 10⁵ g mol⁻¹(Ti) h⁻¹) towards ethylene polymerization. The obtained polyethylene exhibited ultra-high molecular weight (up to 11.82 × 10⁵ g mol⁻¹) with narrow polydispersity. Furthermore, effective co-polymerization of ethylene with 1-hexene or 1-octene was achieved with several percentages of co-monomer incorporation in the resultant polyethylenes.

Citation

Redshaw, C., Chen, L., Sun, W.-H., Wang, L., Yan, Q., & Yang, W. (2014). Half-titanocene 5-t-butyl-2-(1-(arylimino)methyl)quinolin-8-olate chlorides: Synthesis, characterization and ethylene (co-) polymerization behavior. Journal of organometallic chemistry, 753(March), 34-41. https://doi.org/10.1016/j.jorganchem.2013.12.021

• Journal Article Type: Article
• Acceptance Date: Dec 10, 2013
• Publication Date: Mar 1, 2014
• Deposit Date: Jun 10, 2015
• Publicly Available Date: Jun 10, 2015
• Journal: Journal of organometallic chemistry
• Print ISSN: 0022-328X
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 753
• Issue: March
• Pages: 34-41
• DOI: https://doi.org/10.1016/j.jorganchem.2013.12.021
• Keywords: 5-t-Butyl-2-(1-(arylimino)methyl)quinolin-8-ol, Half-titanocene, Ethylene polymerization, Co-polymerization
• Public URL: https://hull-repository.worktribe.com/output/375119
• Publisher URL: http://www.sciencedirect.com/science/article/pii/S0022328X1300884X
• Additional Information: Author's accepted manuscript of article published in: Journal of organometallic chemistry, 2014, v.753, March.
• Contract Date: Jun 10, 2015