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

Date Published: March 01, 2012

Publisher: International Union of Crystallography

Author(s): Jing Yu.


The title complex, [Cu(C13H10ClN2O)(H2O)]NO3·H2O, 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 P21/c. The CuII 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.

Partial Text

For the structures and properties of Schiff base copper(II) complexes, see: Patel et al. (2011 ▶); Creaven et al. (2010 ▶); Osowole et al. (2008 ▶). For the complex with triclinic space group P, see: Liang et al. (2010 ▶).