Date Published: June 01, 2011
Publisher: International Union of Crystallography
Author(s): Shui Hu, ShiPeng Wen, Huai-Ming Hu, Li Liu.
In the title compound, [Ni(C12H6N2O4)(H2O)2], the NiII atom (site symmetry 2) displays a distorted cis-NiN2O4 octahedral coordination geometry with two N atoms and two O atoms of the tetradentate 2,2′-bipyridine-6,6′-dicarboxylate ligand in the equatorial plane and two water molecules in axial positions. The complete dianionic ligand is generated by crystallographic twofold symmetry. In the crystal, a two-dimensional supramolecular structure parallel to (001) is formed through O—H⋯O hydrogen-bond interactions between the coordinated water molecules and the O atoms of nearby carboxylate groups.
For transition metal complexes with the title ligand, see: Knight et al. (2006 ▶); Duan et al. (2009 ▶); Wang et al. (2009 ▶). For lanthanide metal complexes with the title ligand, see: Bunzli et al. (2000 ▶); Wang et al. (2010 ▶).