{μ-6,6'-Dimeth-oxy-2,2'-[ethane-1,2-diylbis(nitrilo-methyl-idyne)]diphenolato-1κO,O,O,O:2κO,N,N',O}(methanol-1κO)(perchlorato-1κO)copper(II)sodium(I).

The mol-ecule of the title compound, [CuNa(C(18)H(18)N(2)O(4))(ClO(4))(CH(3)OH)], is almost planar with mean deviation of 5.2 (8)°. The coordination environment of the Cu(II) ion is distorted square-planar and it is N(2)O(2)-chelated by the 6,6'-dimeth-oxy-2,2'-[ethane-1,2-diylbis(nitrilo-methyl-idyne)]diphenolate Schiff base ligand. The Na atom is chelated by the four O atoms of the Schiff base ligand, and coordinated by a methanol mol-ecule and a perchlorate anion. The six-coordinate Na atom adopts a distorted octa-hedral coordination geometry. The O atoms of the perchlorate anion are disordered over two sites with site-occupancy factors of 0.697 (5) and 0.303 (5). O-H⋯O hydrogen bonding occurs.