Date Published: July 01, 2012
Publisher: International Union of Crystallography
Author(s): Hadi Kargar, Reza Kia, Saeideh Abbasian, Muhammad Nawaz Tahir.
The asymmetric unit of the title compound, [Zn(C19H16Cl4N2O2)(H2O)], comprises two crystallographically independent molecules. The geometry around the ZnII atoms is distorted trigonal–bipyramidal, supported by the N2O2 donor atoms of the tetradentate Schiff base and a coordinating water molecule. The dihedral angles between the benzene rings in the two molecules are 34.10 (15) Å and 30.61 (15) Å. In the crystal, neighbouring independent molecules are linked by pairs of O—H⋯O hydrogen bonds, forming dimers with R22(6) ring motifs, and by O—H⋯Cl hydrogen bonds. There are short Cl⋯Cl [3.4728 (16), 3.4863 (16), and 3.388 (1) Å] contacts present, and molecules are also linked by C—H⋯O and π–π [centroid–centroid distance = 3.671 (2) Å] interactions.
For applications of Schiff base ligands in coordination chemistry, see: Granovski et al. (1993 ▶); Blower et al. (1998 ▶). For a related structure, see: Zhong-Lu et al. (2006 ▶). For standard bond lengths, see: Allen et al. (1987 ▶). For hydrogen-bond motifs, see: Bernstein et al. (1995 ▶). For van der Waals radii, see: Bondi (1964 ▶).