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

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Gardiner, Michael G. Shaw, Miranda F. Suttil, James A. Evans, Stephen J. Mcguinness, David S.
Description	Author Affiliation: Suttil JA ( School of Chemistry, University of Tasmania, Private Bag 75, Hobart, 7001, Australia.)
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 phenoxy-imine $(3-(t-butyl)-2-(OH)-C_{6}H_{4}C=N(C(CH_{3})_{2}CH_{2}OMe)$ 1, $3-(adamantyl)-2-(OH)-C_{6}H_{4}C=N(2′-(2′′-(SMe)C_{6}H_{4})-C_{6}H_{4})$ 2, $3-(t-butyl)-2-(OSiMe_{3})-C_{6}H_{4}C=N(C(CH_{3})_{2}CH_{2}OMe)$ 3) or phenoxy-amine $(3,5-di(t-butyl)-2-(OH)-C_{6}H_{4}CH_{2}-N(2′-(2′′-(OMe)C_{6}H_{4})-C_{6}H_{4})$ 4) ligands have been prepared and reacted with $TiCl_{4}$ or $TiCl_{4}(thf)_{2}$ to give the mono-ligand complexes 5–7. The solid state structures of compounds 4–6 have been determined. Complexes 5–7 have been tested for their potential as ethylene oligomerisation/polymerisation systems in conjunction with MAO activator and benchmarked against the Mitsui phenoxy-imine 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.
ISSN	14779226
Issue Number	25
Volume Number	42
e-ISSN	13645447
Journal	Dalton Trans.
Language	English
Publisher	Royal Society of Chemistry
Publisher Date	2013-07-07
Publisher Place	Great Britain (UK)
Access Restriction	Subscribed
Subject Keyword	Ethylenes Chemistry Imines Organometallic Compounds Chemical Synthesis Phenols Titanium Models, Molecular Molecular Structure Polymerization Journal Article Research Support, Non-U.S. Gov't
Content Type	Text
Resource Type	Article
Subject	Inorganic Chemistry

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