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

Bis(2,2'-bipyridine-[kappa]2N,N')(3-methylbenzoato-[kappa]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 ZnII 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 [pi]-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-H...O hydrogen bonds. The uncoordinated L- anions, HL molecules and water molecules are connected with each other via O-H...O hydrogen bonds, forming chains between the metal complex chains and binding them together via C-H...O contacts. The resulting layers parallel to (010) are further assembled into a three-dimensional supramolecular architecture through additional C-H...O interactions.

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