Details of Grant 

EPSRC Reference:	GR/S04659/01
Title:	New Nitrogen Donor Ligands for Zwitterionic Transition Metal Alkene Polymerisation Catalysts
Principal Investigator:	Bailey, Dr P
Other Investigators:
Researcher Co-Investigators:
Project Partners:
Department:	Sch of Chemistry
Organisation:	University of Edinburgh
Scheme:	Standard Research (Pre-FEC)
Starts:	01 April 2003	Ends:	31 March 2006	Value (£):	73,359
EPSRC Research Topic Classifications:	Catalysis & Applied Catalysis Chemical Synthetic Methodology
EPSRC Industrial Sector Classifications:	Manufacturing Chemicals No relevance to Underpinning Sectors
Related Grants:
Panel History:
Summary on Grant Application Form
The proposed project will employ the bis-pyridylborate and 6-aminofulvene-2-aldimine ligand systems which we have developed in the formation of zwitterionic transition metal alkyl complexes. In such complexes the metal caries a positive charge and the counter negative charge is localised in the ligand. These systems are designed to provide the necessary features of an active alkene polymerisation catalyst in a neutral complex. The majority of existing such catalysts rely upon Lewis acid activation of a catalyst precursor to provide a cationic catalyst complex in the form of a salt. Many of the problems encountered with these catalysts are associated with this activation and the requirement for a counter anion. In this context our ligands provide a number of advantages as follows. (i) The metal centre carries a positive charge. Precedent suggests this is required for highly active catalysts. (ii) There is no counter ion. This removes the problems associated with blocking of the active site by anion co-ordination and/or deactivation by transfer of groups from the counter ion to the metal centre. (iii) The system is not a salt, but rather a neutral molecule and will therefore be more soluble in the non-polar solvents in which the polymerisation must be conducted. (iv) Catalysts would be intrinsically active 'single-component' systems and would not require activation by a Lewis acid co-catalyst. Catalysts of the types [M(L-L)2R] for early/mid transition metals [eg Cr(III), Fe(III)] and [M(L-L)R] for the group 10 metals [e.g. Ni(II), Pd (II)] will be explored thus mimicking in a neutral catalyst their known active cationic analogues.
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Organisation Website:	http://www.ed.ac.uk