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Title: Synthesis, characterisation and catalytic activity of polymerisable cobalt clusters
Author: Owen, A. E.
Awarding Body: University of Wales Swansea
Current Institution: Swansea University
Date of Award: 2004
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The aim of this work is to synthesise and characterise a range of phosphane-substituted polymerisable cobalt clusters and to investigate their utility as hydroformylation catalysts. Chapter one can be thought of as being split into two halves; the first half provides a general introduction to the field of transition metal cluster chemistry, whilst the second focuses on a particular type of cluster, namely alkylidyne tricobalt clusters i.e. clusters containing a Co3C core. Chapters two and three describe the reaction of the [Co3(m3-CR)(CO)9] cluster with a variety of phosphane ligands, where R = C(O)OCH2CH=CH2 and C(O)O(CH2)2OC(O)CH=CH2 respectively. A total of 17 new compounds has been prepared and characterised. Included in chapter two are the x-ray crystal structures of a number of di-substituted, and, in one case, tri-substituted phosphane derivatives. Further, chapter three covers the polymerisation experiments undertaken on a number of clusters and the characterisation of the resultant materials. Chapter four concentrates on the catalytic activity of both cluster monomer and copolymers, namely in the hydroformylation of 1-pentene. Particular attention is paid to the nature of the active catalyst species. Other facets of analysis include contrasting the role of bridging versus terminal ligands, phosphane-substituted versus unsubstituted clusters, etc.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available