COORDINATION COMPLEXES OF ACETYLENE DIPHOSPHINES .I. DIPHOSPHINE-BRIDGED BINUCLEAR COPPER(I) AND GOLD(I) COMPLEXES OF BIS(DIPHENYLPHOSPHINO)ACETYLENE

Complexes of the types (CuX)2(DPPA)3 (X = Cl, Br, I, NO3, NCS, BH4; DPPA = bis(diphenylphosphino)acetylene) and (AuX)2(DPPA)n (n = 1, X = Cl, Br, I, NCS; n = 3, X = I, NCS; n = 4, X = BF4) PF6) have been prepared and characterized. Infrared and Raman spectra of the complexes together with elemental analyses and molecular weight data suggest that the structures are binuclear with bridging bis(diphenylphosphino)acetylene groups. Shifts of the C≡C stretching frequency of the ligand to higher wave number on complexing are consistent with x bonding between the metal and the phosphorus atoms of the ligand. © 1969, American Chemical Society. All rights reserved.