(s,s)-1-{1-[bis(3,5-dimethylphenyl)phosphino]ethyl}-2-[2-(diphenylphosphino)phenyl]ferrocene (acc to cas);(S)-1-{(SP)-2-[2-(Diphenylphosphino)phenyl]ferrocenyl}ethyldi(3,5-xylyl)phosphine;(S)-1-[(S)-1-[Bis(3,5-xylyl)phosphino]ethyl]-2-[2- (diphenylphosphino)phenyl]ferrocene