Metallation of PtRu5(CO)16(μ6-C) by using bis(tri-t-butyl-phosphine) complexes of platinum and palladium

Pt(PBut3)2 and Pd(PBut3)2 react with PtRu5(CO)16(μ6-C) (4) to yield the new cluster complexes, PtRu5(CO)16(μ6-C)[Pt(PBut3)] (5); PtRu5(CO)16(μ6-C)[Pt(PBut3)]2 (6); PtRu5(CO)16(μ6-C)[Pd(PBut3)] (7) and PtRu5(CO)16(μ6-C)[Pd(PBut3)]2 (8). All four complexes have been characterized crystallographically. Compounds 5 and 7 are structurally similar and contain a M(PBut3) group bridging an RuRu edge of the original cluster of 4. Compounds 6 and 8 contain two M(PBut3) groups. One group bridges an RuRu edge as found in compounds 5 and 7. The other M(PBut3) group bridges one of the PtRu edges of the original cluster of 4. All four compounds can be viewed as M(PBut3) adducts of 4 because no ligands were lost from 4 in the course of these addition reactions.