Patent ID: 7301039
Filing Date: 2007-11-27
Classification: B01J,C07F

Abstract:
1. A process for preparation and isolation of a non-amorphous cationic rhodium complex of formula (1), wherein ligand represents an enantiomerically enriched organic compound possessing one or two ligating phosphorus atoms, and wherein m=2 when the ligand is monodentate and m=1 when the ligand is bidentate, which comprises the following steps: (a) Dissolution of Rh(diolefin)(acac) in one or more ethereal solvents; (b) Addition of a fluorinated non-mineral acid HX and alcohol solvent or alcohol-containing solvent mixture, either simultaneously or sequentially, to form a soluble solvated complex of rhodium with one or more of the reaction solvents; (c) Addition of the ligand, either in solution in an organic solvent or neat; (d) Collection of the crystalline precipitate of complex (1)