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Title: Synthesis and ethylene polymerisation studies of titanium imido complexes
Author: Wang, Chao
Awarding Body: University of Oxford
Current Institution: University of Oxford
Date of Award: 2008
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This Thesis describes the synthesis, characterisation and ethylene polymerisation studies ofbititanium imido complexes supported by a variety ofjac-N3 ligands. Chapter 1 introduces homogeneous Ziegler-Natta catalysis, including the role of titanium imido complexes. Bimetallic complexes are reviewed and their polymerisation behaviour is highlighted. Chapter 2 describes the synthesis of new bititanium imido synthons. The X-ray crystal structures and supramolecular structures of bititanium compounds are described and compared with corresponding monometallic counterparts. Chapter 3 describes the synthesis of new bititanium imido complexes supported by a diimido framework with various jac-N3 ligands. A series of single X-ray crystal structures are described and compared with monometallic analogues. Their ethylene polymerisation behavior is investigated and the resulting polyethylene molecular weights compared with mononuclear homologues. Chapter 4 describes the synthesis of new bimetallic complexes linked by the bimacrocyclic ipr4DTNE ligand and the synthesis of new titanium imido compounds supported by the new macrocycle ipr2Me[9]aneN3. The ethylene polymerisation behavior of these complexes is described. Chapter 5 describes the synthesis of Me4DACH supported mono- and bi-titanium imido complexes. The solid state structures including both trans and cis configurations is presented. The ethylene polymerisation behaviour of these compounds is presented. Chapter 6 presents full experimental procedures for Chapters 2 to 5. Chapter 7 contains characterising data for all of the new compounds reported. Appendices A - L contain tables of selected crystallographic data for all new crystallographically characterised complexes described in this Thesis. M contains ethylene uptake figures relating to work discussed in Chapter 3.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available