Chlorodicyclopentylphosphine may be used to prepare:Cp,Cp-MannOP, a chiral diphosphinite ligand by reacting with mannitol.[Cp=cyclopentyl; Mann=mannitol](S)-Cp,Cp-oxoProNOP, a bis(dicycloalkylphosphino) amidophosphine-phosphinite ligand by reacting with (S)-5-(hydroxymethyl)-2-pyrrolidinoneLcPeNiCl, a precursor for preparing LcPeNiH, which is an efficient catalyst for the reduction of CO2[cPe=cyclopentyl]