Bis{[μ-bis-(diphenylarsino)methane-1:2κ2 As:As']nona-carbonyl-1κ3 C,2κ3 C,3κ3 C-[tris-(4-chlorophenyl)phosphine-3κP]- triangulotriruthenium(0)} chloro-form monosolvate

Abstract

The asymmetric unit of the title triangulo-triruthenium compound, 2[Ru 3(C25H22As2)(C18H 12Cl3P)(CO)9]·CHCl3, consists of two mol-ecules (A and B) of the triangulo-triruthenium complex and one mol-ecule of chloro-form solvent. The bis-(diphenylarsino)methane ligand bridges an Ru-Ru bond and the monodentate phosphine ligand bonds to the third Ru atom. Both the phosphine and arsine ligands are equatorial with respect to the Ru 3 triangle. In addition, each Ru atom carries one equatorial and two axial terminal carbonyl ligands. The three phosphine-substituted benzene rings make dihedral angles of 73.5 (3), 57.2 (3) and 75.7 (3)° with each other in mol-ecule A, while these angles are 60.7 (3), 86.8 (3) and 54.9 (3)° in mol-ecule B. The dihedral angles between the two benzene rings are 87.3 (3) and 89.6 (3)° for the two diphenyl-arsino groups in mol-ecule A and 85.6 (3) and 87.7 (3)° in mol-ecule B. In the crystal packing, the mol-ecules are linked into a three-dimensional framework via inter-molecular C-H⋯O and C-H⋯Cl hydrogen bonds. Weak inter-molecular C-H⋯π inter-actions furture stabilize the crystal structure. The crystal studied was an inversion twin, the refined ratio of twin components being 0.480 (7):0.520 (7).