3-[(E)-2-(5,7-Dichloro-8-hydroxyquinolin-2-yl)vinyl]-4-hydroxyphenyl acetate

The two symmetry independent molecules of the title compound, C(19)H(13)Cl(2)NO(4), show similar conformations with the acetyl group twisted strongly relative to the remaining, virtually flat (r. m. s. deviations = 0.0173 and 0.0065 angstrom), part of the molecule. The hydroxyl groups of the 8-hydroxyquinoline residues are involved in intramolecular O-H center dot center dot center dot N hydrogen bonds, which, in one case, forms a part of a three-center interaction. Intermolecular O-H center dot center dot center dot O 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-H center dot center dot center dot O hydrogen bond, in which the hydroxyl H atom is disordered, with its inversion center counterpart.