Synthesis, Characterisation and Evaluation of Chiral Distibines,Multidentate and Macrocyclic Stibines

Lead Research Organisation: University of Southampton
Department Name: School of Chemistry

Abstract

While the chemistry of multidentate P and As ligands has been intensively investigated over the last few decades, only one ligand of this type containing the heavier antimony element is known. Recent work by the applicants and others have however shown that very significant differences are to be found between the metal coordination and organometallic chemistry of the simple (monodentate) P and As ligands and the corresponding Sb ligands. Within this proposal a series of organoantimony compounds with 2, 3 or 4 Sb atoms, including both chiral and macrocyclic derivatives, will be prepared and their chemistry examined in detail with selected 3d and heavier transition metal centres. This work is expected to provide significant insight into the profound differences in electronic properties conferred by the Sb.

Publications

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Gurnani C (2009) Preparation and structures of tellurium(IV) halide complexes with thioether coordination. in Dalton transactions (Cambridge, England : 2003)

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Jura M (2009) Preparation and properties of cyclic and open-chain Sb/N-donor ligands. in Dalton transactions (Cambridge, England : 2003)

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Jura M (2008) Preparation and properties of sterically demanding and chiral distibine ligands. in Dalton transactions (Cambridge, England : 2003)

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Jura M (2009) Preparation and properties of cyclic and open-chain Sb/N-donor ligands. in Dalton transactions (Cambridge, England : 2003)

 
Description New distibine ligands chiral at carbon were synthesised in enantiopure forms, fully characterised and a range of metal complexes prepared. Selected complexes were tested by the EPSRC CATS service, but although they proved catalytically active, the e.e' were poor. The work also made significant advances in the chemistry of pollydentate antimony ligands and in hybrid N/Sb ligands.
Exploitation Route The synthesis routes developed can be applied to other antimony containing systems. The preparation of enantiopure distibines offers a new suite of ligands for catalytic purposes.
Sectors Chemicals

 
Description The work achieved syntheses for a range of bi- and poly-dentate antimony ligands, including chiral distibines, which were used to prepare a range of metal complexes. These complexes were tested for catalytic uses in collaboration with the EPSRC CATS service at St Andrews.
First Year Of Impact 2010
Sector Chemicals
Impact Types Societal