A new two‐dimensional Zn II coordination polymer constructed by a multidentate N‐heterocyclic ligand and 5‐carboxybenzene‐1,3‐dicarboxylate

In the coordination polymer, poly[[{μ‐1‐[(1 H ‐benzimidazol‐2‐yl)methyl]‐1 H ‐imidazole‐κ 2 N : N ′}(μ‐5‐carboxybenzene‐1,3‐dicarboxylato‐κ 2 O 1 : O 3 )zinc(II)] dimethylformamide monosolvate pentahydrate], {[Zn(C 9 H 4 O 6 )(C 11 H 10 N 4 )]·C 3 H 7 NO·5H 2 O} n , the Zn II ion is coordinated by two N atoms from two symmetry‐related 1‐[(1 H ‐benzimidazol‐2‐yl)methyl]‐1 H ‐imidazole (bmi) ligands and two O atoms from two symmetry‐related 5‐carboxybenzene‐1,3‐dicarboxylate (Hbtc 2− ) ligands in a slightly distorted tetrahedral geometry. The Zn II ions are bridged by Hbtc 2− and bmi ligands, leading to a 4‐connected two‐dimensional network with the topological notation (4 4 .6 2 ). Adjacent layers are further connected by 12 kinds of hydrogen bonds and also by π–π interactions, resulting in a three‐dimensional supramolecular architecture in the solid state.