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Ethylene polymerisation and oligomerisation with arene-substituted phenoxy-imine complexes of titanium: investigation of multi-mechanism catalytic behaviour

journal contribution
posted on 2023-05-17, 21:30 authored by Suttil, JA, McGuinness, DS, Michael GardinerMichael Gardiner, Evans, SJ
A range of unsubstituted (1,2) and 6-substituted (3-5) ortho-phenoxy-imine ligands have been prepared and converted to their silyl ether derivatives (6-10). Reaction of silyl ethers with TiCl4(thf)2 in the case of the unsubstituted species yields bis-ligated complexes while the substituted species react cleanly to yield complexes of the form [Ti(O^NR)Cl3(thf)]. In most cases the complexes have been characterised by X-ray crystallography. Testing of the complexes for ethylene oligomerisation and polymerisation has been undertaken employing alkylaluminium co-catalysts (AlEt3, MAO). In all cases the predominant product formed is polyethylene however careful analysis of the liquid phase reveals a complex process by which 1-butene is most likely formed via Cossee mechanism while 1-hexene results from a metallacyclic process.

Funding

Sasol Technology Pty Ltd

History

Publication title

Dalton Transactions

Volume

42

Issue

12

Pagination

4185-4196

ISSN

1477-9226

Department/School

School of Natural Sciences

Publisher

RSC Publications

Place of publication

Thomas Graham House, Science Park, Milton Rd, Cambridge, England, Cambs, Cb4 0Wf

Rights statement

Copyright 2013 Dalton Transactions

Repository Status

  • Restricted

Socio-economic Objectives

Organic industrial chemicals (excl. resins, rubber and plastics)

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