{mu-6,6 '-Dimethoxy-2,2 '-[ethane-1,2-diylbis(nitrilomethylidyne)]diphenolato-1 kappa O-4(6),O-1,O-1 ',O-6 ':2 kappa O-4(1),N,N ',O-1 '}(methanol-1 kappa O)(perchlorato-1 kappa O)nickel(II)sodium

The molecule of the title compound, [NaNi(C18H18N2O4)(ClO4)(CH3OH)], is almost planar, the maximum deviation from the molecular plane being 5.3 (1) angstrom. The Ni2+ ion is N2O2 coordinated by the Schiff base ligand, leading to a slightly distorted square-planar environment. The Na atom is chelated by the four O atoms of the Schiff base ligand and is coordinated by the O atoms of a methanol ligand and a perchlorate anion. The perchlorate ion is disordered over two sites with occupancies 0.723 (12): 0.277 (12).