title: μ-Biphenyl-3,3',4,4'-tetra-carboxyl-ato-κO:O-bis-[triaqua-(2,2'-bipyridyl-κN,N')nickel(II)] hexa-hydrate.
abstract: The asymmetric unit of the title complex, [Ni(2)(C(16)H(6)O(8))(C(10)H(8)N(2))(2)(H(2)O)(6)]·6H(2)O, contains one Ni(II) atom, one 2,2'-bipyridine ligand, three coordinated water mol-ecules, one-half of a fully deprotonated biphenyl-3,3',4,4'-tetra-carboxyl-ate anion and three lattice water mol-ecules. The Ni(II) atom displays a distorted NiN(2)O(4) octa-hedral coordination formed by one carboxyl-ate O atom, three water O atoms and two N atoms of the chelating ligand. The complete biphenyl-3,3',4,4'-tetra-carboxyl-ate ligand displays inversion symmetry and links two symmetry-related Ni(II) atoms into a binuclear complex. Neighbouring complex mol-ecules are linked through O-H⋯O hydrogen bonds into a three-dimensional structure. Additional O-H⋯O hydrogen bonds between the lattice water mol-ecules help to consolidate the crystal packing.
authors.forename: Dong
authors.initials: D
authors.lastname: Zhou
authors.forename: Min
authors.initials: M
authors.lastname: Shao
authors.forename: Xiang
authors.initials: X
authors.lastname: He
authors.forename: Yongmei
authors.initials: Y
authors.lastname: Zhao
authors.forename: Shourong
authors.initials: S
authors.lastname: Zhu