Crystal structure of {μ-6,6′-dimeth­oxy-2,2′-[ethane-1,2-diylbis(nitrilo­methanylyl­idene)]diphenolato}(meth­anol)(nitrato)nickel(II)sodium

Two phenolate O atoms provided by a Schiff base ligand create a double bridge between Ni²⁺ and Na⁺ ions. The coordination environment of the Ni²⁺ ion is square-planar and it has an unusual seven-coordinated geometry: four atoms from the Schiff base ligand, two from a nitrate anion, which coordinates in a bidentate chelating mode, and one O atom from the coordinated methanol mol­ecule. C—H...O weak hydrogen-bond inter­actions result in the formation of chains along the b-axis direction which are further assembled by bifurcated O—H...O hydrogen bonds and π-stacking inter­actions.