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Title: A study of some early transition metal halide complexes
Author: Hughes, John
Awarding Body: University of Warwick
Current Institution: University of Warwick
Date of Award: 1974
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The coordination chemistry, in particular the position of the penta-coordinate state, of the halides of the early transition metals (titanium, vanadium and chromium) has been studied from two viewpoints. 1) The reactivity and stability of the metals in the penta-coordinate state has been investigated. A solution decomposition to a dimeric state, containing the metals in octahedral environment, was found to be active in the MC13 2NMe3 adducts. The nature of this decomposition and the reactivity of the product has been investigated. 2) The complex formation of the metals with bulky multi-dentate ligands, inductive to penta-coordination, was studied. '!he octahedral nature of the metal was found to be sufficiently powerful to control the donor roles of the ligands involved. The zirconium/trimethylamine system has been investigated, in the (+4) and (+3) oxidation states. Here, in contrast to the first series metals, the ability of the metal to readily assume a coordination number greater than six is seen to playa major role in reaction. Possible structures for the adducts obtained are discussed in terms of eight coordinate polymeric species.
Supervisor: Not available Sponsor: Science Research Council
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available
Keywords: QD Chemistry