Poly[[[μ2-1,1′-(butane-1,4-diyl)bis(1H-imidazole)-κ2N3:N3′](μ2-2,6-dimethylpyridine-3,5-dicarboxylato-κ2O3:O5)zinc] dihydrate]

In the title coordination polymer, {[Zn(C9H7NO4)(C10H14N4)]center dot 2H(2)O}(n), the Zn-II ion displays a distorted tetrahedral geometry with two imidazole N atoms from two 1,1'-(butane-1,4-diyl)bis(imidazole) (bbi) ligands and two carboxylate O atoms from two 2,6-dimethylpyridine-3,5-dicarboxylate (dpdc) ligands. The bbi and dpdc ligands bridge the Zn-II ions, forming layers parallel to (011). O-H center dot center dot center dot O and O-H center dot center dot center dot N hydrogen bonds and pi-pi interactions between the imidazole rings [centroid-centroid distance = 3.807 (5) angstrom] connect the layers. Two of the three uncoordinated water molecules are disordered, each over two 0.25-occupancy positions.