title: Crystal structure of {μ-6,6'-dimeth-oxy-2,2'-[ethane-1,2-diylbis(nitrilo-methanylyl-idene)]diphenolato}(meth-anol)(nitrato)nickel(II)sodium.
abstract: In the molecular structure of the title compound, [NaNi(C18H18N2O4)(NO3)(CH3OH)], the Ni(2+) ion has a slightly distorted square-planar coordination environment defined by two N and two O atoms which belong to a Schiff base ligand, viz. 6,6'-dimeth-oxy-2,2'-[ethane-1,2-diylbis(nitrilo-methanylyl-idene)]diphenolate. Seven O atoms form the coordination environment of the Na(+) ion: four from the Schiff base ligand, two from a bidentate chelating nitrate anion and one O atom from a coordinating methanol mol-ecule. In the crystal, the bimetallic complexes are assembled into chains along the b-axis direction via weak C-H⋯O hydrogen-bond inter-actions. Neighbouring chains are in turn connected through bifurcated O-H⋯O hydrogen bonds that involve the coordinating methanol mol-ecules and the nitrate anions, and through π-π stacking inter-actions between phenyl rings of neighbouring mol-ecules.
authors.affiliation: Taras Shevchenko National University of Kyiv, Department of Chemistry, 64/13 Volodymyrska Street, Kyiv 01601, Ukraine.
authors.forename: Olesia V
authors.initials: OV
authors.lastname: Moroz
authors.affiliation: Taras Shevchenko National University of Kyiv, Department of Chemistry, 64/13 Volodymyrska Street, Kyiv 01601, Ukraine.
authors.forename: Viktor A
authors.initials: VA
authors.lastname: Trush
authors.affiliation: Taras Shevchenko National University of Kyiv, Department of Chemistry, 64/13 Volodymyrska Street, Kyiv 01601, Ukraine.
authors.forename: Tatiana Yu
authors.initials: TY
authors.lastname: Sliva
authors.affiliation: STC "Institute for Single Crystals", National Academy of Science of Ukraine, 60 Lenina Avenue, Kharkiv 61001, Ukraine.
authors.forename: Irina S
authors.initials: IS
authors.lastname: Konovalova
authors.affiliation: Taras Shevchenko National University of Kyiv, Department of Chemistry, 64/13 Volodymyrska Street, Kyiv 01601, Ukraine.
authors.forename: Vladimir M
authors.initials: VM
authors.lastname: Amirkhanov
keywords: NiII–Na heterometallic complex; Schiff base; crystal structure; hydrogen bonds; π–π stacking