Poly[bis(2,2′‐bipyridine‐κ2N,N′)bis(μ6‐2,4,6‐trimethylbenzene‐1,3,5‐tricarboxylato)tricadmium(II)], a two‐dimensional `Kagomé dual' (kgd) sheet structure

The title metal–organic framework, Cd₃(C₁₂H₉O₆)₂(C₁₀H₈N₂)₂]_n, has been synthesized by a solvothermal reaction. The Cd^II ions are located in CdO₄N₂ and CdO₆ six‐coordinated environments, with the latter Cd^II ion lying on an inversion centre. The 2,4,6‐trimethylbenzene‐1,3,5‐tricarboxylate ligand (TMBTC) connects the Cd^II ions to form a two‐dimensional sheet incorporating hourglass‐like Cd₃(COO)₆] secondary building units (SBUs). Topologically, taking the TMBTC ligand and the Cd₃(COO)₆] SBU as 3‐ and 6‐connected nodes, respectively, the overall two‐dimensional sheet can be simplified to a rare (3,6)‐connected 2‐nodal kgd (Kagomé dual) net with a short Schläfli vertex notation of {4³}₂{4⁶.6⁶.8³}, which further stacks into a three‐dimensional supramolecular framework through π–π stacking interactions.