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Synthesis of Ti(IV) complexes of donor-functionalised phenoxy-imine tridentates and their evaluation in ethylene oligomerisation and polymerisation

Citation

Suttil, JA and Shaw, MF and McGuinness, DS and Gardiner, MG and Evans, SJ, Synthesis of Ti(IV) complexes of donor-functionalised phenoxy-imine tridentates and their evaluation in ethylene oligomerisation and polymerisation, Dalton Transactions: the international journal for inorganic, organometallic and bioinorganic chemistry, 42, (25) pp. 9129-9138. ISSN 1477-9226 (2013) [Refereed Article]

Copyright Statement

Copyright 2013 Dalton Transactions

DOI: doi:10.1039/c3dt32465f

Abstract

A number of analogues of the Mitsui Chemicals ethylene trimerisation system (IV) have been explored, in which one of the donor atoms have been modified. Thus, a series of mono-anionic tridentate phenoxyimine (3-(t-butyl)-2-(OH)-C6H4C=N(C(CH3)2CH2OMe) 1, 3-(adamantyl)-2-(OH)-C6H4C=N(2-(2-(SMe)- C6H4)-C6H4) 2, 3-(t-butyl)-2-(OSiMe3)-C6H4C=N(C(CH3)2CH2OMe) 3) or phenoxy-amine (3,5-di(t-butyl)-2-(OH)-C6H4CH2-N(2-(2-(OMe)C6H4)-C6H4) 4) ligands have been prepared and reacted with TiCl4 or TiCl4(thf)2 to give the mono-ligand complexes 57. The solid state structures of compounds 46 have been determined. Complexes 57 have been tested for their potential as ethylene oligomerisation/polymerisation systems in conjunction with MAO activator and benchmarked against the Mitsui phenoxyimine trimerisation system IV. While the phenoxy-amine complex 6 shows a propensity for polymer formation, the phenoxy-imine complexes 5 and 7 show somewhat increased formation of short chain LAOs. Complex 5 is selective for 1-butene in the oligomeric fraction, while 7 displays liquid phase selectivity to 1-hexene. As such 7, which is a sulfur substituted analogue of the Mitsui system IV, displays similar characteristics to the parent catalyst. However, its utility is limited by the lower activity and predominant formation of polyethylene.

Item Details

Item Type:Refereed Article
Keywords:catalysis, titanium, oligomerisation
Research Division:Chemical Sciences
Research Group:Other Chemical Sciences
Research Field:Organometallic Chemistry
Objective Division:Manufacturing
Objective Group:Industrial Chemicals and Related Products
Objective Field:Organic Industrial Chemicals (excl. Resins, Rubber and Plastics)
Author:Suttil, JA (Mr James Suttil)
Author:Shaw, MF (Miss Miranda Shaw)
Author:McGuinness, DS (Dr David McGuinness)
Author:Gardiner, MG (Associate Professor Michael Gardiner)
ID Code:88315
Year Published:2013
Web of Science® Times Cited:9
Deposited By:Chemistry
Deposited On:2014-01-28
Last Modified:2016-12-19
Downloads:0

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