(S)1[(1R)2(di-C-hexylphosphino)ferrocen. ]et-diphenylphosphin; (S)-1-[(1R)-2-(Dicyclohexylphosphino)ferrocenyl]ethyldi-phenylphosphine; 1,2,3,4,5-cyclopentanepentayl, compd. with 1-(dicyclohexylphosphino)-2-[(1S)-1-(diphenylphosphino)ethyl]-1,2,3,4,5-cyclopentanepentayl, iron salt (1:1:1); (S,S)-1-(Dicyclohexylphosphino)-2-[1-(Diphenylphosphino)Ethyl]Ferrocene