Patent ID: 7491671

Claim:
A process for preparing a catalyst solution which comprises reacting metal complexes and diphosphines in the presence of an inert organic solvent, wherein a) an uncharged or cationic metal complex having a TM8 metal as central atom, and b) a salt of a chiral ditertiary diphosphine which has one or two phospholane groups which are bound to a carbon chain having from 2 to 4 carbon atoms and contain anions selected from the group consisting of R c COO − , R c SO 3 − , BF 4 − , PF 6 − , AsF 6 − , SbF 6 − , B(C 6 F 5 ) 4 − and B(3,5-bistrifluoromethylphenyl) 4 − , are reacted with one another, where the ratio of the components a) and b) is from 1:1 to 1:2, R c is C 1 -C 6 -haloalkyl, C 5 -C 10 -halocycloalkyl or C 6 -C 10 -haloaryl, and wherein the metal complex used as component a) corresponds to one of the formulae: [M(diene) 2 ]X, [M(ene) 2 A] 2 , [M(diene)A] a , [M(diene)L 2 ]X, [MIL b A] and [RuCl 2 B)] 2 , [RuL 3 A]X, [Ru(diene)(carboxylate) 2 ] 2 , wherein M is Rh or Ir, diene is a linear or cyclic diolefin, ene is an olefin, X is an anion selected from the group consisting of BF 4 − , PF 6 − , SbF 6 − , C 3 COO − , CF 3 COO − , CH 3 SO 3 − and CF 3 SO 3 − , A is an anionic ligand selected from the group consisting of cyclopentadienyl, substituted cyclopentadienyl, acetylacetonate, tetramethylheptanedionate, hydride and chloride, a is 0 or 1, b is 2, 3 or 4, L is an uncharged ligand selected from the group consisting of CO, CH 3 CN, PhCN, DMSO, pyridine, substituted pyridine and PR 3 , where R is alkyl, substituted alkyl, aryl, substituted aryl, heteroaryl or substituted heteroaryl, carboxylate is the salt of a lower C 1 -C 8 -carboxylic acid, and B is benzene or alkyl-substituted benzene, and wherein the component b) is a phospholane salt of the formula (I) or (II): wherein R 1 =R 4 and are each OH, alkyl, aryl, aralkyl, alkoxy, aryloxy or aralkyloxy; R 2 and R 3 are each, independently of one another, H, OH, alkyl, aryl, aralkyl, alkoxy, aryloxy or aralkyloxy; or R 2 and R 3 together form part of a cycloaliphatic, cycloheteroaliphatic, aromatic or heteroaromatic ring; R a , R b are each, independently of one another, a monovalent hydrocarbon radical which has from 1 to 22 carbon atoms and is unsubstituted or substituted, or the two hydrocarbon radicals together with the P atom can form a 3- to 8-membered ring; Z is a chain comprising from 2 to 4 carbon atoms which may be part of a 1,2-aryl, 1,2-heteroaryl, 1,2-cycloalkyl, 1,2-heterocycloalkyl ring or a 1,1′-bisarylene or 1,1′-bisheteroarylene; and X − is an anion R c COO − , R c SO 3 − , where R c =C 1-4 -alkyl, C 5-10 -cycloalkyl, or C 6-10 aryl, in each case substituted by halogen atoms, BF 4 − , PF 6 − , AsF 6 − , SbF 6 − , B(C 6 F 5 ) 4 − or B(3,5-bistrifluoromethylphenyl) 4 − , with the proviso that the compounds 1,2-bis(2,5-dimethylphospholanyl)benzene tetrafluoroborate and 1,2-bis(2,5-dimethylphospholanyl)benzene bistetrafluoroborate are excluded.