2-Benzimidazolyl-N-phenylquinoline-8-carboxamide chromium(III) trichlorides: Synthesis and application for ethylene oligomerization and polymerization

Wang, Deligeer; Liu, Shaofeng; Zeng, Yanning; Sun, Wen Hua; Redshaw, Carl

Abstract

A series of chromium(III) complexes, LCrCl3 (C1-C6: L = 2-(1H-benzo- [d]imidazol-2-yl)-N-(2,6-R1-4-R2-phenyl) quinoline-8-carboxamide; C1: R1 = iPr, R2 = H; C2: R1 = Et, R2= H; C3: R1 = Me, R2 = H; C4: R1 = Me, R2 = Me; C5: R1 = H, R2 = H; C6: R 1 = F, R2 = H), was synthesized and characterized by IR spectroscopy, elemental analysis, mass spectra, and magnetic moments. The X-ray crystallographic analysis of complexes C2 and C3 reveals distorted octahedral geometries around the chromium atoms. Upon activation with MAO, these complexes exhibit high activities for ethylene oligomerization (up to 1.28 × 107 g.mol-1(Cr).h-1) and ethylene polymerization (up to 6.30×106 g.mol-1(Cr).h-1). The oligomers were produced with high selectivity for R-olefins (>99%), and the distribution closely resembled the Schultz-Flory rule. Various reaction parameters were investigated in detail, and the results revealed that both the steric and electronic effects of the ligands effect the catalytic activities of these chromium complexes as well as the distribution of the products formed. © 2011 American Chemical Society.

Citation

Wang, D., Liu, S., Zeng, Y., Sun, W. H., & Redshaw, C. (2011). 2-Benzimidazolyl-N-phenylquinoline-8-carboxamide chromium(III) trichlorides: Synthesis and application for ethylene oligomerization and polymerization. Organometallics, 30(11), 3001-3009. https://doi.org/10.1021/om2001124

• Journal Article Type: Article
• Publication Date: May 17, 2011
• Deposit Date: Jun 8, 2022
• Journal: Organometallics
• Print ISSN: 0276-7333
• Electronic ISSN: 1520-6041
• Publisher: American Chemical Society
• Peer Reviewed: Peer Reviewed
• Volume: 30
• Issue: 11
• Pages: 3001-3009
• DOI: https://doi.org/10.1021/om2001124
• Public URL: https://hull-repository.worktribe.com/output/3622436