Received 5 February 2011
aFaculty of Chemistry, Islamic Azad University, North Tehran Branch, Tehran, Iran,bDepartment of Chemistry, School of Sciences, Ferdowsi University of Mashhad, Mashhad 917791436, Iran, and cDepartment of Chemistry, Shahid Beheshti University, G. C., Evin, Tehran 1983963113, Iran
Correspondence e-mail: email@example.com
The title compound, (C10H10NO)2[Cu(C7H3NO4)2]·CH3OH·H2O was prepared by the reaction of copper(II) nitrate hexahydrate, 8-hydroxy-2-methylquinoline, and pyridine-2,6-dicarboxylic acid in a 1:2:2 molar ratio in an aqueous solution. The geometry of the resulting CuN2O4 coordination can be described as distorted octahedral. In the crystal, there are several intermolecular O-HO, N-HO and C-HO hydrogen bonds. An intramolecular N-HO hydrogen bond occurs in one of the cations. Considerable - stacking interactions are also observed between the aromatic rings of the cations, with centroid-centroid distances of 3.4567 (13), 3.5342 (14), 3.6941 (14) and 3.4568 (13) Å. These non-covalent interactions connect the components, forming a three-dimensional supramolecular structure.
For background to proton-transfer compounds, see: Aghabozorg et al. (2008). For examples of proton transfer from pyridine-2,6-dicarboxylic acid (pydcH2) to different amine base ligands, see: Eshtiagh-Hosseini et al. (2010a,b,c).
Data collection: X-AREA (Stoe & Cie, 2005); cell refinement: X-AREA; data reduction: X-AREA; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 1997); software used to prepare material for publication: WinGX (Farrugia, 1999).
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: VM2078 ).
The authors thank the Faculty of Chemistry, Islamic Azad University, North Tehran Branch, for financial support.
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