Crystal structure of chlorido{1-(2, 3-dimethyl-5-oxido-1-phenyl-1H-pyrazol-2-ium-4-yl-κO)-2-[3-methyl-5-oxo-1-phenyl-4, 5-dihydro-1H-pyrazol-4-ylidene-κO]hydrazin-1-ido-κN1}copper(II) from laboratory X-ray powder data

In the title compound, [Cu(C21H19N6O2)Cl], the CuII atom is in a slightly distorted square-planar coordination involving two O atoms from the pyrazolone rings [Cu - O = 2.088 (10) and 1.975 (10) Å], an N atom of the azo group [Cu - N = 2.048 (13) Å] and a chloride anion [Cu - Cl = 2.183 (5) Å]. The organic anions act as tridentate chelating ligands. The molecules stack in columns along the c axis.