Patent ID: 7462731

Claim:
A catalyst of formula: wherein: R 6 represents a neutral optionally substituted hydrocarbyl, a neutral optionally substituted perhalogenated hydrocarbyl, or an optionally substituted cyclopentadienyl ligand; each of A and B is present as a sulphonamide group represented by —NR 7 —, —NHR 7 , NR 7 R 8 , —NR 11 —, —NHR 11 or NR 10 R 11 wherein R 8 and R 10 are each independently optionally substituted hydrocarbyl, perhalogenated hydrocarbyl or an optionally substituted heterocyclyl group, and where R 7 and R 11 is a sulphonyl group represented by —S(O) 2 R 9 or —S(O) 2 R 12 , wherein R 9 and R 12 is an optionally substituted hydrocarbyl group which is a cyclic alkyl group comprising from 3 to 10 carbon atoms in the largest ring and optionally including one or more bridging groups; E represents a linking group; M represents a metal capable of catalysing transfer hydrogenation; and Y represents an anionic group, a basic ligand or a vacant site; provided that when Y is not a vacant site, at least one of A or B carries a hydrogen atom.