Date Published: July 01, 2012
Publisher: International Union of Crystallography
Author(s): Hadi Kargar, Reza Kia, Amir Adabi Ardakani, Muhammad Nawaz Tahir.
The asymmetric unit of the title compound, C18H16Cl4N2O2, comprises half of a potentially tetradentate Schiff base ligand. It is located about a twofold rotation axis that bisects the central C—C bond of the butane-1,4-diamine group. There are two intramolecular O—H⋯N hydrogen bonds making S(6) ring motifs. In the crystal, molecules are linked by pairs of weak C—H⋯Cl interactions, forming inversion dimers, which are further connected by C—H⋯O hydrogen bonds into two-dimensional frameworks that lie parallel to (001).
For standard bond lengths, see: Allen et al. (1987 ▶). For hydrogen-bond motifs, see: Bernstein et al. (1995 ▶). For related Schiff base ligands, see: Kargar et al. (2011 ▶); Kia et al. (2010 ▶).