title: catena-Poly[[diaqua-zinc(II)]-μ-piper-azine-1,4-diacetato-κN,O:N,O].
abstract: The asymmetric unit of the title compound, [Zn(C(8)H(12)N(2)O(4))(H(2)O)(2)](n), contains a Zn(II) ion residing on an inversion center, half of a centrosymmetric piperazine-1,4-diacetate ligand (L) and a water mol-ecule. The Zn(II) ion is trans-coordinated by two N,O-bidentate L ligands and by two water mol-ecules in a distorted octa-hedral geometry. In the crystal structure, inter-molecular O-H⋯O hydrogen bonds link polymeric chains into a three-dimensional supra-molecular structure.
authors.affiliation: Deparment of Chemistry and Chemical Engineering, Hefei Normal University, Hefei 230061, People's Republic of China.
authors.forename: Jian-Hong
authors.initials: JH
authors.lastname: Bi