Abstract
In the title compound, C22H24O5, each of the cyclohexenone rings adopts a half-chair conformation. The hydroxy and carbonyl O atoms face each other and are orientated to allow for the formation of the two intramolecular O—H⋯O hydrogen bonds which are typical of xanthene derivatives. In the crystal, weak intermolecular C—H⋯O hydrogen bonds link molecules into layers parallel to the ab plane.
Highlights
In the title compound, C22H24O5, each of the cyclohexenone rings adopts a half-chair conformation
The hydroxy and carbonyl O atoms face each other and are orientated to allow for the formation of the two intramolecular O—HÁ Á ÁO hydrogen bonds which are typical of xanthene derivatives
H atoms treated by a mixture of independent and constrained refinement
Summary
Key indicators: single-crystal X-ray study; T = 297 K; mean (C–C) = 0.002 A; R factor = 0.038; wR factor = 0.119; data-to-parameter ratio = 16.9. The hydroxy and carbonyl O atoms face each other and are orientated to allow for the formation of the two intramolecular O—HÁ Á ÁO hydrogen bonds which are typical of xanthene derivatives. Weak intermolecular C—HÁ Á ÁO hydrogen bonds link molecules into layers parallel to the ab plane. Related literature For the biological activity of xanthenes and their derivatives, see: Jonathan et al (1988); Delfourne et al (2000); Koeller et al (2003); For related xanthene structures, see: Bolte et al (2001); Palakshi Reddy et al (2010).
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