Abstract
In the title compound, C25H27ClO3, each of the cyclohexenone rings adopts an envelope conformation, whereas the six-membered pyran ring adopts a flattened boat conformation, with the O and methine C atoms deviating from the plane of the other four atoms. The C=C double bond is in the trans conformation. In the crystal, weak C—H⋯O hydrogen bonds link the molecules into chains running parallel to the b axis.
Highlights
C25H27ClO3, each of the cyclohexenone rings adopts an envelope conformation, whereas the sixmembered pyran ring adopts a flattened boat conformation, with the O and methine C atoms deviating from the plane of the other four atoms
The C=C double bond is in the trans conformation
Weak C—HÁ Á ÁO hydrogen bonds link the molecules into chains running parallel to the b axis
Summary
Key indicators: single-crystal X-ray study; T = 296 K; mean (C–C) = 0.004 A; R factor = 0.057; wR factor = 0.194; data-to-parameter ratio = 18.4. C25H27ClO3, each of the cyclohexenone rings adopts an envelope conformation, whereas the sixmembered pyran ring adopts a flattened boat conformation, with the O and methine C atoms deviating from the plane of the other four atoms. The C=C double bond is in the trans conformation. Weak C—HÁ Á ÁO hydrogen bonds link the molecules into chains running parallel to the b axis. Related literature For the synthesis and the crystal structures of xanthene derivatives studied recently by our group, see: Cha et al (2013); Lee et al (2012, 2013)
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