title: catena-Poly[[[triaqua-copper(II)]-μ-2,2'-bipyridine-3,3'-dicarboxyl-ato-κN,N':O] monohydrate].
abstract: The title compound, {[Cu(C(12)H(6)N(2)O(4))(H(2)O)(3)]·H(2)O}(n), was synthesized under hydro-thermal conditions. The Cu(2+) ion is six-coordinated by three water O atoms, and two N atoms and one O atom of the 2,2'-bipyridine-3,3'-dicarboxyl-ate bridging ligand in a sligthly distorted octa-hedral environment. The 2,2-bipyridine-3,3'-dicarboxyl-ate bridges link the Cu(2+) ions into chains along the b-axis direction. These chains are further linked by O-H⋯O hydrogen bonds involving the water solvent mol-ecules, forming a three-dimensional framework.
authors.affiliation: Department of Materials and Chemical Engineering, Ministry of Education Key Laboratory of Application Technology of Hainan Superior Resources Chemical Materials, Hainan University, Haikou 570228, Hainan Province,  People's Republic of China.
authors.forename: Qihui
authors.initials: Q
authors.lastname: Wu
authors.forename: Fuxiang
authors.initials: F
authors.lastname: Wang
authors.forename: Nanqing
authors.initials: N
authors.lastname: Jiang
authors.forename: Li
authors.initials: L
authors.lastname: Cao
authors.forename: Qinhe
authors.initials: Q
authors.lastname: Pan