The synthesis of the first tetra- and penta-gold decaosmium clusters, X-ray structure analysis of [Os10Au4C(CO)24{P(C6H11)3}3]

Abstract

The clusters [Os₁₀Au₄C(CO)₂₄{PR₃}₃]{PR₃= P(C₆H₁₁)₃(3a), PPh₃(3b), or PMe₂Ph (3c)} and [Os₁₀Au₅C(CO)₂₄{PPh₃}₄]⁺(4) have been prepared from the reaction of the dianion [Os₁₀C(CO)₂₄]^2–(1) with [(AuPR₃)₃O]BF₄ which involves the corresponding intermediate monoanions [Os₁₀C(CO)₂₄AuPR₃]^–; the structure of the cluster (3a) has been fully established by X-ray single crystal analysis and contains a novel heterometallic polyhedron consisting of fused Au₄ and Os₁₀ tetrahedra linked via a vertex and a capping edge, respectively.