Self‐assembly reactions of the triply‐bonded dirhenium complex cis‐[Re2Cl2(dppm)2(O2CC5H4N‐4)2] with cis‐protected PtII and ZnII precursors have produced heterometallic squares. Analogous reactions with Ag(O3SCF3), cis‐[Re2Cl4(O2CCH3)2(H2O)2] and [Rh2(O2CCH3)4] have yielded mixed‐metal polymeric structures. These results demonstrate that the isonicotinate ligand is useful for accessing heterometallic structures involving metal−metal bonded complexes. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)