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

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.