A second polymorph of aqua­{4-chloro-2-[(pyridin-2-ylmeth­yl)imino­meth­yl]­phenolato}copper(II) nitrate mono­hydrate

The title complex, [Cu(C(13)H(10)ClN(2)O)(H(2)O)]NO(3)·H(2)O, was obtained by the reaction of 5-chloro­salicyl­aldehyde, 2-(amino­meth­yl)pyridine and copper nitrate in methanol. The first reported polymorph of this complex was triclinic [Liang et al. (2010 ▶). Acta Cryst. E66, m40]. The present polymorph crystallized in the monoclinic space group P2(1)/c. The Cu(II) ion is in a square planar environment and is coordinated by one phenolate O, one imine N and one pyridine N atom of the tridentate Schiff base ligand and by one water O atom. In the crystal, mol­ecules are linked through inter­molecular O—H⋯O hydrogen bonds to form chains along the a axis.