1,2,3,4,5-Cyclopentanepentayl, compd. with 1-[(1R)-1-(dicyclohexy lphosphino)ethyl]-2-[2-(diphenylphosphino)phenyl]-1,2,3,4,5-cyclo pentanepentayl, iron salt (1:1:1) [ 849925-19-5 ]