Poly[tetra­aqua­bis­(μ(3)-benzene-1,3-di­carboxyl­ato-κ(3) O:O′:O′′)bis­(μ(2)-benzene-1,3-dicarboxyl­ato-κ(3) O,O′:O′′)[μ(2)-1,4-bis­(1,2,4-triazol-1-yl)butane-κ(2) N:N′]tetra­zinc(II)]

In the crystal structure of the title compound, [Zn(4)(C(8)H(4)O(4))(4)(C(8)H(12)N(6))(H(2)O)(4)](n), one Zn(II) atom is four-coordinated in a slightly distorted tetra­hedral geometry by two O atoms from benzene-1,3-dicarboxyl­ate (BDC) ligands, one N atom from a 1,4-bis­(1,2,4-triazol-1-yl)butane (BTB) ligand and one water mol­ecule, while a second Zn(II) atom is five-coordinated in a distorted square-pyramidal geometry bridged by four O atoms from BDC ligands and one water mol­ecule. The Zn(II) atoms are connected by the benzene-1,3-dicarboxyl­ate anions and the nitro­gen ligand into layers parallel to the ac plane. The asymmetric unit consits of two crystallographically independent Zn(II) cations, two BDC anions and two water mol­ecules in general positions, as well as one-half of the BTB ligand that is completed by inversion symmetry.