Abstract
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].
Highlights
In the title compound, C18H10Cl2O4, the chromen-2-one ring system is almost planar [maximum deviation = 0.028 (1) Å]
For the stability of the temperature controller used for the data collection, see: Cosier & Glazer (1986)
H atoms treated by a mixture of independent and constrained refinement max = 0.54 e Å3
Summary
R factor = 0.036; wR factor = 0.101; data-to-parameter ratio = 30.2. C18H10Cl2O4, the chromen-2-one ring system is almost planar [maximum deviation = 0.028 (1) Å]. 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. Molecules are linked into sheets lying parallel to (100) via intermolecular C—H O hydrogen bonds. The crystal packing is further consolidated by – stacking interactions [centroid-to-centroid separation = 3.6615 (6) Å]
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