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Catalysts 2013, 3(1), 148-156; doi:10.3390/catal3010148

Article

Ethylene Polymerization Using (Imino)vanadium(V) Dichloride Complexes Containing (Anilido)methyl-pyridine, -quinoline Ligands–Halogenated Al Alkyls Catalyst Systems

Atsushi Igarashi ¹ , Wenjuan Zhang ² , Wen-Hua Sun ²  and Kotohiro Nomura ^1,*

¹ Department of Chemistry, Tokyo Metropolitan University, 1-1 Minami Osawa, Hachioji, Tokyo 192-0397, Japan ² Institute of Chemistry, Chinese Academy of Sciences, Zhongguancun, Beijing 100190, China

* Author to whom correspondence should be addressed.

Received: 25 December 2012; in revised form: 29 January 2013 / Accepted: 30 January 2013 / Published: 7 February 2013

(This article belongs to the Special Issue Molecular Catalysis for Precise Olefin Polymerization)

Download PDF Full-Text [251 KB, uploaded 7 February 2013 09:03 CET]

Abstract: The effect of ligand and Al cocatalysts in ethylene polymerization, using V(N-1-adamantyl)Cl₂(L) [L = 2-(2,6-Me₂C₆H₃)NCH₂(C₉H₆N), 8-(2,6-Me₂C₆H₃)NCH₂(C₉H₆N)] and V(N-2-MeC₆H₃)Cl₂[2-(2,6-R'₂C₆H₃)NCH₂(C₅H₄N)] (R' = Me, ⁱPr), has been explored. The reaction products in the presence of Et₂AlCl or Me₂AlCl cocatalyst were polyethylene whereas the reaction product of the 2-methylphenylimido analogues in the presence of MAO cocatalyst was 1-butene with high selectivity, suggesting that the catalyst/cocatalyst nuclearity effect plays a role in this catalysis.

Keywords: ethylene; vanadium catalysts; polymerization; ligand effect

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