Poly[diaqua­(μ(4)-benzene-1,2,4,5-tetra­carboxyl­ato)[μ(2)-1,4-bis­(3-pyridyl­meth­yl)piperazine]dizinc(II)]

In the title compound, [Zn(2)(C(10)H(2)O(8))(C(16)H(20)N(4))(H(2)O)(2)](n), the Zn(II) atom is in a distorted tetra­hedral environment, being coordinated by one N atom from a 1,4-bis­(3-pyridyl­meth­yl)piperazine (3-bpmp) ligand, two O atoms from two carboxyl­ate groups of the pyromellitate anion and one water mol­ecule. The distortion of the tetrahedral coordination may be ascribed to the hydrogen bonds between the carboxyl­ate groups and the adjacent water mol­ecules. Each Zn(II) atom links to three organic ligands and each pyromellitate ligand coordinates to four Zn(II) atoms, forming a (3,4)-connected infinite three-dimensional framework. O—H⋯N inter­actions also occur.