Isocyanides carbonyl ligand displacement

Work with the platinum triangle 20 pioneered by Puddephatt and co-workers has continued." Isocyanide ligands have been used to displace carbonyl ligands, and complex 21 is the first Pt3 cluster to have been isolated without a bridging atom (Scheme 4). Aspects of the structures of the isocyanide compounds are discussed in Section 8.07.2.6. 

Addition of cyclic tin or germanium diamides to 45 results in displacement of the carbonyl, with the generation of new clusters 46 in high yield (Equation (8)) excess germanium reagent results in displacement of the phosphine on the platinum. Similar carbonyl displacements are observed with isocyanide ligands the products of these reactions are discussed in Section 8.07.2.7. ... 

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