| Summary: | In the title compound, C18H10Cl2O4, the chromen-2-one ring system is almost planar [maximum deviation = 0.028 (1) Å] and is inclined at an angle of 16.35 (4)° with respect to the benzene ring. The C=C bond has an E configuration. The molecular conformation is stabilized by an almost symmetric intramolecular O...H...O hydrogen bond and a C—H...O interaction, both of which form S(6) ring motifs. In the crystal structure, molecules are linked into sheets lying parallel to (100) via intermolecular C—H...O hydrogen bonds. The crystal packing is further consolidated by π–π stacking interactions [centroid-to-centroid separation = 3.6615 (6) Å].
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