Acta Cryst. (2009). E65, o515 [ doi:10.1107/S1600536809001950 ]
Abstract: The two symmetry independent molecules of the title compound, C19H13Cl2NO4, show similar conformations with the acetyl group twisted strongly relative to the remaining, virtually flat (r.m.s. deviations = 0.0173 and 0.0065 Å), part of the molecule. The hydroxyl groups of the 8-hydroxyquinoline residues are involved in intramolecular O-HN hydrogen bonds, which, in one case, forms a part of a three-center interaction. Intermolecular O-HO hydrogen bonds assemble the molecules into a one-dimensional polymeric structure extended along the a axis. The 4-hydroxyphenyl group of one molecule forms an O-HO hydrogen bond, in which the hydroxyl H atom is disordered, with its inversion center counterpart.
Online 11 February 2009
Copyright © International Union of Crystallography