Abstract
In the biologically active title compound, C26H26O5, the pyran ring of the chromene unit adopts a half-chair conformation. The C=C double bond of the propenone unit exhibits a trans conformation and the carbonyl group is syn conformation to the double bond. The dihedral angle between the benzene ring and the benzopyranone moiety is 31.54 (4)°. The molecular structure is stabilized by an intramolecular C=O⋯H—O hydrogen bond.
Highlights
In the biologically active title compound, C26H26O5, the pyran ring of the chromene unit adopts a half-chair conformation
The molecular structure is stabilized by an intramolecular C OÁ Á ÁH—O hydrogen bond
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: FF2099)
Summary
Key indicators: single-crystal X-ray study; T = 446 K; mean (C–C) = 0.001 A; R factor = 0.037; wR factor = 0.104; data-to-parameter ratio = 17.9. In the biologically active title compound, C26H26O5, the pyran ring of the chromene unit adopts a half-chair conformation. The C C double bond of the propenone unit exhibits a trans conformation and the carbonyl group is syn conformation to the double bond. The dihedral angle between the benzene ring and the benzopyranone moiety is 31.54 (4). The molecular structure is stabilized by an intramolecular C OÁ Á ÁH—O hydrogen bond. Monoclinic, P21=c a = 9.6422 (2) Ab = 12.0871 (3) Ac = 18.4517 (4) A = 99.228 (1) V = 2122.64 (8) A 3
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