(S)-N,N-Dimethyl-1-[(R)-1,2-bis(diphenylphosphino)ferrocenyl]ethylamine; (S,R)-1-(1-dimethylaminoethyl)-1,2-*bis(diphenyl; 1,2,3,4,5-cyclopentanepentayl, 1-[(1S)-1-(dimethylamino)ethyl]-2-(diphenylphosphino)-, compd. with 1-(diphenylphosphino)-1,2,3,4,5-cyclopentanepentayl, iron salt (1:1:1)