Crystal structure of catena-poly[[[tetra­aqua­zinc(II)]-μ-1,4-bis­[4-(1H-imidazol-1-yl)benzo­yl]piperazine] dinitrate monohydrate]

In the title polymeric complex, {[Zn(C(24)H(22)N(6)O(2))(H(2)O)(4)](NO(3))(2)·2H(2)O}(n), the Zn(II) cation, located about a twofold rotation axis, is coordinated by two imidazole groups and four water mol­ecules in a distorted N(2)O(4) octa­hedral geometry; among the four coordinate water mol­ecules, two are located on the same twofold rotation axis. The 1,4-bis­[4-(1H-imidazol-1-yl)benzo­yl]piperazine] ligand is centro-symmetric, with the centroid of the piperazine ring located on an inversion center, and bridges the Zn(II) cations, forming polymeric chains propagating along [201]. In the crystal, O—H⋯O and weak C—H⋯O hydrogen bonds link the polymeric chains, nitrate anions and solvent water mol­ecules into a three-dimensional supra­molecular architecture. A short O⋯O contact of 2.823 (13) Å is observed between neighboring nitrate anions.