A second monoclinic polymorph of (pyridine-2-carboxaldehyde oximato-κ2NN′)(pyridine-2-carboxaldehyde oxime-κ2NN′)palladium(II) chloride

摘要

The asymmetric unit of the title compound, [Pd(C6H5N2O)(C6H6N2O)]Cl, contains one half of a cationic Pd^II complex and a Cl⁻ anion, with a crystallographic mirror plane parallel to the ac plane passing through the Pd and Cl atoms. In the complex, the Pd^II ion is four-coordinated in a distorted square-planar environment by four N atoms derived from the two chelating ligands. The hy­droxy H atom lies on the mirror plane and so is equidistant from the O atoms. This indicates that the negative charge is delocalized over the two O atoms. The complex mol­ecules are stacked in columns along the c axis and are connected by C—H⋯O hydrogen bonds, forming a three-dimensional network. The structure reported herein represents a new monoclinic polymorph of the previously reported monoclinic (C2/c) form [Torabi et al. (2007). Z. Kristallogr. New Cryst. Struct. >222, 197–198].