Acta Cryst. (2012). E68, m1156-m1157
[ doi:10.1107/S1600536812034216 ]

Bis(2,2'-bipyridine-²N,N')(3-methylbenzoato-²O,O')zinc 3-methylbenzoate-3-methylbenzoic acid-water (1/1/2)

Q. Ye, J. Qi and J. Lin

Abstract: The title compound, [Zn(C₈H₇O₂)(C₁₀H₈N₂)₂](C₈H₇O₂)·C₈H₈O₂·2H₂O, is comprised of a Zn²⁺ cation, two 2,2'-bipydine (bipy) ligands and one 3-methylbenzoate anion (L^-) together with one uncoordinating L^- anion, one uncoordinating HL molecule and two lattice water molecules. The Zn^II atom is coordinated by four N atoms of two bipy ligands and two O atoms from one L^- ligand in a distorted octahedral geometry. Pairs of centrosymmetrically related complex molecules form dimers via slipped -stacking interactions between bipy ligands with an interplanar distance of 3.470 (4) Å. The dimers are linked into supramolecular chains along [111], via C-HO hydrogen bonds. The uncoordinated L^- anions, HL molecules and water molecules are connected with each other via O-HO hydrogen bonds, forming chains between the metal complex chains and binding them together via C-HO contacts. The resulting layers parallel to (010) are further assembled into a three-dimensional supramolecular architecture through additional C-HO interactions.

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