Research Article: μ-Benzene-1,2,4,5-tetra­carboxyl­ato-κ4O1,O2:O4,O5-bis­[diaqua(phen­an­thro­line-κ2N,N′)nickel(II)] 0.67-hydrate

Date Published: March 01, 2012

Publisher: International Union of Crystallography

Author(s): Changfu Zhuang, Ning Li, Xiao-yang Yu.


The asymmetric unit of the title compound, [Ni2(C10H2O8)(C12H8N2)2(H2O)4]·0.67H2O, contains one complete binuclear complex and one half-mol­ecule, the latter being completed by crystallographic inversion symmetry, and 0.67 of a solvent water molecule. Each Ni2+ cation is coordinated by a 1,10-phenanthroline ligand, a bidentate benzene-1,2,4,5-tetra­carboxyl­ate (btec) tetra-anion and two water mol­ecules to generate a distorted cis-NiN2O4 octa­hedral coordination geometry. The btec species bridges the metal ions. In the crystal, the clusters and uncoordinated water mol­ecules are linked by O—H⋯O hydrogen bonds and π–π inter­actions [shortest centroid–centroid separation = 3.596 (2) Å] to form a three-dimensional network.

Partial Text

For btec as a ligand in coordination chemistry, see: Lu et al. (2005 ▶).