Booth nnd Chatt Soine Coq!deXes of 590. Some Complexes of Ditertiary Phosphirzes with iVicEel(1r) und Nickel(111) By G. BOOTH and J. CHATT Coinplexes of bivalent nickel of the types [NiX,(diphosphine)] and [NiX,(diphosphine),] (X r= C1 Br or I)where diphosphine = Ph,P-CH,-PPh or R,P*C,H,-PR (R = Me Et or Ph) are d