Structure of chlorobis(dicyclohexylphenylphosphine)gold(I)

[AuCl[C6H11)2(C6H5)P]2], Mr = 781.2, monoclinic, P2(1), a = 11.117 (4), b = 13.606 (5), c = 12.284 (4) A, beta = 109.59 (3) degrees, V = 1753 (2) A3, Z = 2, D chi = 1.48 g cm-3, lambda(Mo K alpha) = 0.71073 A, mu = 43.8 cm-1, F(000) = 792, T = 296 K, final R = 0.024 for 3239 unique observed reflections. The formation of complexes of the type LnAuX, where L is a phosphine, and X is halide or pseudohalide, shows considerable dependence on the nature of the phosphine. When L = Ph3P, three- and four-coordinated complexes are very easily prepared. However, for L = Cy3P, only linearly coordinated complexes could be isolated. The geometry of the title complex, with L = CyPhP, is best described as distorted trigonal planar. The P-Au-P angle is 158.24 (5) degrees while the P-Au-Cl angles are 92.63 (6) and 108.71 (6) degrees. Au-P distances are 2.300 (1) and 2.324 (1) A while Au-Cl is 2.744 (2) A.