SYNTHESIS OF MONONUCLEAR AND POLYNUCLEAR PERHALOPHENYL PALLADIUM PLATINUM ACETYLIDE COMPLEXES - MOLECULAR-STRUCTURE OF (NBU4)2[PT2AG2(C6F5)4(C=CPH)4].4CH2CL2

The reaction between [Ag(C = CR)]n (R = (t)Bu, Ph) and the appropriate mononuclear palladium or platinum substrate affords mononuclear derivatives of the type [M(C6F5)(C = CR)L2] (M = Pd, Pt; R = (t)Bu, Ph; L = PPh3, dppe). Polynuclear (NBu4)2[Pt2Ag2(C6F5)4(C = CPh)4] (X = F, Cl; R = Ph, (t)Bu) complexes are obtained by reaction between (NBu4)2[Pt2(mu-X')2(C6X5)4] (X' = Cl, X = F; X' = I, X = Cl) and [Ag(C = CR)]n (Pt: Ag ratio 1:2). Similar heterometallic derivatives Q2[Pt2M2(C6F5)4 (C = CR)4] (Q = PMePh3, NBu4; M = Ag, Cu; R = Ph, (t)Bu) can be prepared by reaction of Q2[cis-Pt(C6F5)2(C = CR)2] with AgCl or CuCl (Pt:M ratio 1:1). The structure of (NBu4)2[Pt2Ag2(C6F5)4 (C = CPh)4].4CH2Cl2 has been determined by X-ray diffraction.