title: Poly[diaqua-(μ(4)-benzene-1,2,4,5-tetra-carboxyl-ato)[μ(2)-1,4-bis-(3-pyridyl-meth-yl)piperazine]dizinc(II)].
abstract: 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 tetra-hedral environment, being coordinated by one N atom from a 1,4-bis-(3-pyridyl-meth-yl)piperazine (3-bpmp) ligand, two O atoms from two carboxyl-ate groups of the pyromellitate anion and one water mol-ecule. The distortion of the tetrahedral coordination may be ascribed to the hydrogen bonds between the carboxyl-ate groups and the adjacent water mol-ecules. 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 inter-actions also occur.
authors.forename: Hui-Feng
authors.initials: HF
authors.lastname: Zhang
authors.forename: Yan
authors.initials: Y
authors.lastname: Li
authors.forename: Wen-Xiu
authors.initials: WX
authors.lastname: Zhao
authors.forename: Liang-Zhong
authors.initials: LZ
authors.lastname: Zhao
authors.forename: Duo
authors.initials: D
authors.lastname: Zhang