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Details of Grant 

EPSRC Reference: GR/R91977/01
Title: Boron-bridged constrained geometry complexes of group III and group IV metals
Principal Investigator: Welton, Professor T
Other Investigators:
Braunschweig, Professor H
Researcher Co-Investigators:
Project Partners:
Department: Chemistry
Organisation: Imperial College London
Scheme: Standard Research (Pre-FEC)
Starts: 01 April 2003 Ends: 31 March 2006 Value (£): 100,021
EPSRC Research Topic Classifications:
Chemical Synthetic Methodology
EPSRC Industrial Sector Classifications:
Chemicals No relevance to Underpinning Sectors
Related Grants:
Panel History:  
Summary on Grant Application Form
Recently, we published a convenient multi-step high-yield synthesis for the first constrained geometry complexes (CGCs) of titanium with a bridging boron atom. One of the main aims of this proposal is the exploitation of this procedure for the synthesis of corresponding boron-bridged CGC's of other group IV as well as group III metals and lanthanides. CGCs are of particular interest due to their outstanding qualities in copolymerisations of ethene with higher olefins and styrenes. Furthermore, it is well known that an adjacent Lewis-acidic centre can have an acceleration effect on such catalytic processes. Hence, we expect our CGCs bearing a Lewis-acidic and electron withdrawing three co-ordinate boron moiety to be well suited catalysts for aforementioned polymerisations. Therefore, extensive investigations on the copolymerisation characteristics for these systems are a most important part of this proposal. Besides, CGCs are widely used as versatile catalysts in organic synthesis. We intend to examine the effect of the boron moiety in some of these reactions. In the second stage of the project variation of the ligand framework will be established for further improvement of the reactions under investigation.
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Organisation Website: http://www.imperial.ac.uk