Bis(8-hy­droxy-2-methyl­quinolinium) bis­(pyridine-2,6-dicarboxyl­ato)cuprate(II) methanol monosolvate monohydrate

The title compound, (C(10)H(10)NO)(2)[Cu(C(7)H(3)NO(4))(2)]·CH(3)OH·H(2)O 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 CuN(2)O(4) coordination can be described as distorted octa­hedral. In the crystal, there are several inter­molecular O—H⋯O, N—H⋯O and C—H⋯O hydrogen bonds. An intra­molecular N—H⋯O hydrogen bond occurs in one of the cations. Considerable π–π 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.