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Preparation and structures of aryloxy– and alkoxy–Ti(IV) complexes and their evaluation in ethylene oligomerisation and polymerisation

Citation

Suttil, JA and McGuinness, DS and Pichler, M and Gardiner, MG and Morgan, DH and Evans, SJ, Preparation and structures of aryloxy- and alkoxy-Ti(IV) complexes and their evaluation in ethylene oligomerisation and polymerisation, Dalton Transactions, 41, (22) pp. 6625-6633. ISSN 1477-9226 (2012) [Refereed Article]

Copyright Statement

Copyright The Royal Society of Chemistry 2012

DOI: doi:10.1039/c2dt11737a

Abstract

A range of aryloxy and alkoxy ligands, both monodenate and chelating, have been coordinated to Ti(IV) to yield complexes of the form [Ti(OAr)2Cl2], [Ti(RO^O)Cl3] and [Ti(RO^O)2Cl2] (R = aryl, alkyl). The complexes vary in their Lewis base solvation and/or aggregation state, as revealed by X-ray crystallography of selected examples. The complexes have been evaluated as catalysts for ethylene oligomerisation and polymerisation following activation with alkylaluminium reagents (AlEt3, methylaluminoxane). While polyethylene is the major product, ethylene oligomers also result, ranging from dimers to higher oligomers. The results indicate a number of different active species are formed upon activation, with oligomers likely arising through a metallacyclic mechanism. The findings are discussed in the context of the commercial Alphabutol dimerisation system [Ti(OR)4], and the development of group 4 based ethylene trimerisation catalysts.

Item Details

Item Type:Refereed Article
Research Division:Chemical Sciences
Research Group:Inorganic Chemistry
Research Field:Transition Metal Chemistry
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Chemical Sciences
Author:Suttil, JA (Mr James Suttil)
Author:McGuinness, DS (Dr David McGuinness)
Author:Pichler, M (Mr Markus Pichler)
Author:Gardiner, MG (Associate Professor Michael Gardiner)
ID Code:78554
Year Published:2012
Web of Science® Times Cited:13
Deposited By:Chemistry
Deposited On:2012-07-07
Last Modified:2013-04-22
Downloads:0

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