CHIRAL FERROCENYLS
The invention relates to chiral ferrocenyls of formula (I), wherein Ra is -P(R10R11) or -SR12; Rb is -P(R'10R'11), -SR'12, -CH=NR12, -CH2-NH-R12 or -CH2-O-P(R10R11); and the other substituents are as defined in claim 1, which may be used as ligands for transition metal catalysts in enantioselective reactions.