Assembling metal clusters with covalent linkers: Synthesis and structure of a quasi-planar Pt-18 dendrimer containing five clusters connected by sigma-alkynyl spacers

Sterically protected tri- and hexanuclear platinum clusters were used as building blocks for the high-yield synthesis of a first-generation dendrimer (see picture; tBu groups are omitted for clarity), which is chemically and thermally stable, and in which the cluster units are separated by conjugated 1,3,5-triethynylphenyl groups.