Heterometallic trinuclear or pentanuclear complexes aligned as Rh−Pt−M Rh−Pt−M−Pt−Rh (M=Pt, Pd, Cu), respectively, were kinetically and thermodynamically synthesized characterized. These polynuclear complexes, in which three kinds of metals form straight one-dimensional structures with metal–metal bonds, are presented sweet, three-colored, Japanese dango dumplings. More information can be found...