Reactivity studies of electron poor titanium amides

Williams, Tara N (2011) Reactivity studies of electron poor titanium amides. Doctoral thesis (DPhil), University of Sussex.

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Chapter One presents an overview of olefin polymerisation, which provides the context for the majority of the work described in later chapters. Both Ziegler-Natta and late transition metal systems are described.

Chapter Two describes the synthesis and reactivity of trisamido titanium complexes with the diarylamido fragments derived from diphenylamine and di-p-tolylamine. These complexes have been thoroughly studied using NMR spectroscopy. This chapter also presents the syntheses of two rare examples of trisamido methyl complexes. In addition, an improved synthetic route to the cocatalyst, KB(C6F5)4 and the structures of [B(C6F5)C4H8O] and [Mg(C6F5)2(Et2O)(dioxane)] are described.

Chapter Three describes the polymerisation activity of the catalysts derived from (R2N)3TiCl, (R2N)3TiMe, and [(R2N)3Ti]+ with the cocatalysts MAO, B(C6F5)3, and KB(C6F5)4. Data was recorded for each of the catalysts, and the consumption of propene over time was plotted. Rate constants were found for each of the polymerisation reactions. The mechanism for the polymerisation of each of these was also examined.

Chapter Four presents the synthesis and reactivities of new trisamido complexes using 10,11-dihydro-dibenz(b,f )azepinyl, hereafter abbrievated as dda, as the amide fragment. Specifically, syntheses of (dda)3TiCl, (dda)3TiMe and (dda)3TiBH4 are described and their characterisation by NMR spectroscopy and X-ray crystallography is presented. The use of these complexes in synthetic approaches to (dda)3TiH are described. Initial steps in the characterisation of hydride transfer to CO2 from (dda)3TiH are also presented.

Chapter Five presents details for the experimental work and Appendices are included, containing selected experimental data.

Item Type: Thesis (Doctoral)
Schools and Departments: School of Life Sciences > Chemistry
Subjects: Q Science > QD Chemistry
Q Science > QD Chemistry > QD0146 Inorganic chemistry
Depositing User: Library Cataloguing
Date Deposited: 18 May 2011 05:51
Last Modified: 14 Aug 2015 13:15
Google Scholar:17 Citations

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