Acta Cryst. (2012). E68, o2244-o2245 [ doi:10.1107/S1600536812028693 ]
Abstract: 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-HN hydrogen bonds making S(6) ring motifs. In the crystal, molecules are linked by pairs of weak C-HCl interactions, forming inversion dimers, which are further connected by C-HO hydrogen bonds into two-dimensional frameworks that lie parallel to (001).
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