Abstract
In the title compound, C17H10Br2O5, the chromene ring is almost planar with minimal puckering [total puckering amplitude = 0.067 (4) Å]. The dihedral angle between chromeme ring system and phenyl ring is 3.7 (2)°. The crystal structure is stabilized by intermolecular C—H⋯O interactions and an intramolecular O—H⋯O hydrogen bond also occurs.
Highlights
C17H10Br2O5, the chromene ring is almost planar with minimal puckering [total puckering amplitude = 0.067 (4) A ]
The crystal structure is stabilized by intermolecular C—HÁ Á ÁO interactions and an intramolecular O—HÁ Á ÁO hydrogen bond occurs
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: ER2060)
Summary
Key indicators: single-crystal X-ray study; T = 293 K; mean (C–C) = 0.006 A; R factor = 0.044; wR factor = 0.105; data-to-parameter ratio = 17.1. C17H10Br2O5, the chromene ring is almost planar with minimal puckering [total puckering amplitude = 0.067 (4) A ]. The dihedral angle between chromeme ring system and phenyl ring is 3.7 (2). The crystal structure is stabilized by intermolecular C—HÁ Á ÁO interactions and an intramolecular O—HÁ Á ÁO hydrogen bond occurs. For the importance of 4H-chromenes, see: Liu et al (2007); Wang, Fang et al (2003); Wang, Zhang et al (2003). See: Bernstein et al (1995); Desiraju (1989); Desiraju & Steiner (1999); Etter (1990)
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