A μ-Bis(phosphino)ethane Gold(I) Dimer

Abstract

Bis(bromo,cyano )-μ-[bis( dicyclohexylphosphino))ethane-P,P']-digold, [Au_2( C_(26)H_(48)P_2){Br_(1.16)(CN)_(0.84)}], M_r= 931.09, monoclinic, P2_1/n, ɑ = 9.772 (3), b = 15.366 (4), c = 20.973 (5) Å, β = 102.53(2)º, V = 3074.2 (15) Å^3, Z = 4, D_x = 2.01 g cm^(-3), λ(Mo Kɑ)= 0.71073 Å, μ = 111.2 cm^(-1), F(000) = 1774, room temperature (297 K), R = 0.029 for 2255 reflections with F_o > 3σ(f_o^2). A bis(dicyclohexylphosphino)ethane ligand bonds one Au atom at each P atom. The Au atoms are further bonded to Br^- or CN^- ions in a disordered manner, with the bromide populations being 0.532 (5) on Aul and 0.628 (5) on Au2.

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