Dibromidobis-(4-hydr-oxy-1,5-dimethyl-2-phenyl-3-pyrazolone)zinc(II)

Abstract

In the title compound, [ZnBr(2)(C(11)H(12)N(2)O(2))(2)], the Zn(II) ion is coordinated by two Br atoms and two O atoms from two 4-hydroxy-anti-pyrine mol-ecules via the carbonyl O atoms, which act as monodentate ligands, giving rise to a distorted tetra-hedral geometry. The values of the bond angles at the Zn atom are in the range 99.4 (1) to 113.2 (1)°. The presence of O-H⋯O and O-H⋯Br intra-molecular hydrogen bonds can explain the difference between the two Zn-O [1.961 (3)/2.015 (3) Å] and the two Zn-Br [2.350 (1)/2.378 (1) Å] bond lengths. The crystal structure is governed by C-H⋯O, C-H⋯Br and Zn-Br⋯Cg(π-ring) inter-actions.

Fig. 1.

Molecular view of the complex with the atom-labelling scheme. Ellipsoids are drawn at the 50% probability level. Hydrogen bonds are shown as dashed lines. H atoms are represented as small spheres of arbitrary radii.