1,2,3,4,5-Cyclopentanepentayl, compd. with 1-[(1S)-1-[bis(3,5-dim ethylphenyl)phosphino]ethyl]-2-(di-1-naphthalenylphosphino)-1,2,3 ,4,5-cyclopentanepentayl, iron salt (1:1:1) [ 851308-40-2 ]