Here is the reference I mentioned above:

A new route to chiral bis-tertiary phosphine ligands: synthesis, resolution, and crystal structure of trans-bis-1,2-(diphenylphosphino)cyclopentane and the nickel adduct [trans-1,2-(PPh2)2C5H8]NiBr2. Allen, David L. et al. Journal of the Chemical Society, Chemical Communications (1983), (16), 895-6. CODEN: JCCCAT ISSN: 0022-4936. Journal written in English. CAN 100:34631 AN 1984:34631 CAPLUS

Abstract

Grignard reaction of PhMgBr with diphosphinocyclopentane I (R = Cl), prepd. by heating white P, PCl3 and cyclopentene at 200, gave I (R = Ph) (II). II with NiBr2 in 95% aq. EtOH gave the II.NiBr2 complex (III). Crystn. of III from CH2Cl2 gave crystals of (+)- and (-)-III.CH2Cl2, which were sepd. by hand picking. Treatment of (+)-III.CH2Cl2 with NaCN gave (-)-II. (-)-II with [RhLCl]2 (L = 1,4-cyclooctadiene) catalyzed the hydrogenation of methyl(N-benzoyl)- and (N-benzoyl)dehydrophenylalanine to give hydrogenated products of .apprx.100% optical purity. The crystal structures of II and III.CH2Cl2 are reported.