Cluster chemistry. 27. The synthesis and structural characterization of three mixed gold-cobalt-ruthenium carbonyl clusters Ph3PAuCoRu3(CO)13, (Ph3PAu)2CoRu3(H)(CO)12, and (Ph3PAu)3CoRu3(CO)12

Article abstract of DOI:10.1021/om00079a019

A unique series of mixed gold-cobalt-ruthenium carbonyl clusters has been prepared and structurally characterized. Reaction of [(Ph₃PAu)₃O]BF₄ with HCoRu₃(CO)₁₃ gives the three clusters Ph₃PAu-CoRu₃(CO)₁₃ (1), (Ph₃PAu)₂CoRu₃(H)(CO)₁₂ (2), and (Ph₃PAu)₃CoRu₃(CO)₁₂ (3). An alternative specific route to 3 is via [(Ph₃PAu)₃O]BF₄ and [CoRu₃(CO)₁₃] , while Ph₃PAuCl and [CoRu₃(CO)₁₃]^- give exclusively 1. For 1 [C₃₁H₁₅O₁₃AuCoPRu₃, a = 9.345 (3) ?, b = 14.217 (4) ?, c = 14.721 (3) ?, α = 114.83 (2)°, β = 93.16 (2)° γ = 92.44°, triclinic, P1, Z = 2] a trigonal-bipyramidal core is found, with the Ph₃PAu group triply bridging a CoRu₂ triangle. For 2 [C₄₈H₃₁Au₂CoO₁₂P₂Ru ₃·0.5CH₂Cl₂, a = 35.173 (9) ?, b = 13.548 (9) ?, c = 23.193 (4) ?, β = 102.27 (2)°, monoclinic, C2/c, Z = 8] a capped trigonal-bipyramid core exists with the second Ph₃PAu group capping an AuRu₂ face of 1 and the hydride ligand bridging an Ru-Ru bond. The structures are rationalized in terms of the maximum number of face-sharing tetrahedra; the isolobality of H and Ph₃PAu is not valid in the context of polygold clusters.