title: μ-Benzene-1,2,4,5-tetra-carboxyl-ato-κO,O:O,O-bis-[diaqua(phen-an-thro-line-κN,N')nickel(II)] 0.67-hydrate.
abstract: The asymmetric unit of the title compound, [Ni(2)(C(10)H(2)O(8))(C(12)H(8)N(2))(2)(H(2)O)(4)]·0.67H(2)O, contains one complete binuclear complex and one half-mol-ecule, the latter being completed by crystallographic inversion symmetry, and 0.67 of a solvent water molecule. Each Ni(2+) cation is coordinated by a 1,10-phenanthroline ligand, a bidentate benzene-1,2,4,5-tetra-carboxyl-ate (btec) tetra-anion and two water mol-ecules to generate a distorted cis-NiN(2)O(4) octa-hedral coordination geometry. The btec species bridges the metal ions. In the crystal, the clusters and uncoordinated water mol-ecules are linked by O-H⋯O hydrogen bonds and π-π inter-actions [shortest centroid-centroid separation = 3.596 (2) Å] to form a three-dimensional network.
authors.forename: Changfu
authors.initials: C
authors.lastname: Zhuang
authors.forename: Ning
authors.initials: N
authors.lastname: Li
authors.forename: Xiao-Yang
authors.initials: XY
authors.lastname: Yu