Abstract
The title compound, C25H29ClO4, adopts a trans conformation about the C=C double bond and the dimethylcyclohexenone rings both show an envelope conformation with the dimethyl-substituted C atom as the flap. In the molecule, the hydroxy and carbonyl groups form two intramolecular O—H⋯O hydrogen bonds typical for xanthene derivatives. In the crystal, weak C—H⋯O hydrogen bonds link the molecules into chains running parallel to the a-axis direction.
Highlights
The title compound, C25H29ClO4, adopts a trans conformation about the C C double bond and the dimethylcyclohexenone rings both show an envelope conformation with the dimethylsubstituted C atom as the flap
Weak C—HÁ Á ÁO hydrogen bonds link the molecules into chains running parallel to the a-axis direction
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: FF2113)
Summary
Key indicators: single-crystal X-ray study; T = 296 K; mean (C–C) = 0.003 A; R factor = 0.045; wR factor = 0.135; data-to-parameter ratio = 18.4. The title compound, C25H29ClO4, adopts a trans conformation about the C C double bond and the dimethylcyclohexenone rings both show an envelope conformation with the dimethylsubstituted C atom as the flap. The hydroxy and carbonyl groups form two intramolecular O—HÁ Á ÁO hydrogen bonds typical for xanthene derivatives. Weak C—HÁ Á ÁO hydrogen bonds link the molecules into chains running parallel to the a-axis direction. Related literature For the crystal structures of xanthene derivatives studied recently our group, see: Cha et al (2011, 2012, 2013)
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