6a,14a-cis-6,6a,7,14a-Tetrahydrochromeno[4′,3′:3,4]pyrano[3,2-c]coumarin
✍ Scribed by Krishna, R. ;Aravindan, P. G. ;Yogavel, M. ;Velmurugan, D. ;Shanmuga Sundara Raj, S. ;Fun, H.-K. ;Shanmuga Sundaram, M. ;Raghunathan, R.
- Book ID
- 104480821
- Publisher
- International Union of Crystallography
- Year
- 2003
- Tongue
- English
- Weight
- 233 KB
- Volume
- 59
- Category
- Article
- ISSN
- 1600-5368
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✦ Synopsis
Single-crystal X-ray study T = 293 K Mean '(C±C) = 0.003 A Ê R factor = 0.065 wR factor = 0.167 Data-to-parameter ratio = 25.4 For details of how these key indicators were automatically derived from the article, see http://journals.iucr.org/e.
📜 SIMILAR VOLUMES
In the title compound, C 29 H 23 NO 2 , the quinolinone moiety is planar and the pyran ring is in a half-chair form. The cyclopentene fused with the pyran ring adopts an envelope conformation. There are CÐHÁ Á ÁO, CÐHÁ Á Á% and %Á Á Á% intermolecular interactions.
The structure of the title compound, C 13 H 16 O 4 , comprises a non-planar chiral molecule where the cyclohexene double bond is distinctly shorter [1.335 (2) A ˚] than the neighbouring C-C single bonds (>1.4 A ˚).
Single crystals of senecio lactone, C 8 H 8 O 4 , isolated from Senecio scandens Buch-Ham, were obtained from an acetone solution. In the crystal structure, molecules are linked to each other by intermolecular O-HÁ Á ÁO hydrogen bonds involving a ketone group and the hydroxyl group.
In the title compound, C 25 H 22 N 2 O 3 S, the dihydropyran ring adopts a half-chair conformation and the dihydrothiapyran ring adopts a sofa conformation.