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A study of the preparation and reactions of titanium (IV) carboxylates

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Illson, Timothy Frank (1988) A study of the preparation and reactions of titanium (IV) carboxylates. PhD thesis, University of Warwick.

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Official URL: http://webcat.warwick.ac.uk/record=b1455051~S15

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Abstract

This thesis describes preparative methods for a number of titanium (IV)
trischloromonocarboxylates, TiCl3(RC02)(R = C6H5, (C6H5)2(CH3)C,
(CH3)2CH, (CH3)3C, C9H6N, o - CH3C6H4, p - CH3C6H4, C6H2(CH3)3,
C6H5CH=CH and CH3CH=CH). The reactions of some of these carboxylates
with oxygen and nitrogen donor ligands are also described.
An X-ray crystallographic study of TiCl3[(CH3)3CO2] showed that the complex
exists as trimeric molecules in the solid state. Cryoscopic molecular weight
and 1H NMR experiments indicated that the complex dissociates into dimers in
solution.
The structure of Ti2Cl7(CH3CH=CHC02)(CH3CH=CHC02H) is reported. The
complex has a triply bridged structure with two bridging chlorine atoms and a
carboxylate bridge linking the titanium centres.
Hydrolysis reactions of TiCl3(RC02) species are described and an unusual
170 exchange effect in esters was observed. A mechanism based upon the
AAC2 ester hydrolysis mechanism is proposed for this effect. Cyclic
Voltarnmetry experiments on [TiCl2(C6H5CO2)EtOAc]20 indicate that both Ti
(IV) centres are reduced to Ti(III) and that the reduction product reacts with a
component of the solution to regenerate the starting material.
Some titanium-magnesium bimetallic complexes were prepared and
characterised.

Item Type: Thesis or Dissertation (PhD)
Subjects: Q Science > QD Chemistry
Library of Congress Subject Headings (LCSH): Metallic soaps -- Analysis, Titanium compounds -- Analysis
Official Date: September 1988
Dates:
DateEvent
September 1988Submitted
Institution: University of Warwick
Theses Department: Department of Chemistry
Thesis Type: PhD
Publication Status: Unpublished
Supervisor(s)/Advisor: Wallbridge, Malcolm
Sponsors: Science and Engineering Research Council (Great Britain) (SERC) ; Imperial Chemical Industries PLC
Extent: [8], 203 leaves
Language: eng

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