The synthesis and characterisation of the cluster dianion [PtRu5C(CO)15]2− and its reactions with Au and Pt cationic fragments produced in situ

Abstract

The neutral mixed-metal cluster [PtRu₅C(CO)₁₆] was reduced by KOH in methanol to give [Ph₄P]₂[PtRu₅C(CO)₁₅] 1 in 84% yield. Reaction of 1 with Au(PPh₃)Cl afforded the gold derivative [PtRu₅C(CO)₁₅(AuPPh₃)₂] 2. Other reactions of 1 with [Pt(COD)Cl₂] and [Pt(CO)(PPh₃)Cl₂] in the presence of silica yielded the new mixed-metal cluster compounds [Pt₂Ru₄C(CO)₁₃(COD)] 3, [Ph₄P]₂[Pt₃Ru₁₀C₂(CO)₃₂] 4, [Pt₄Ru₅C(CO)₁₆(PPh₃)₃] 5, [PtRu₄C(CO)₁₃(PPh₃)] 6 and [Pt₂Ru₄C(CO)₁₄(PPh₃)] 7. Compounds 1–7 were characterised spectroscopically and the molecular and crystal structures of compound 1–5 were determined by single crystal X-ray crystallography.