Information card for entry 7160306

Structure parameters

• Formula: C19 H12 O4
• Calculated formula: C19 H12 O4
• Title of publication: Synthesis of pyrano[3,2-<i>c</i>]chromene-2,5-diones from 4-hydroxycoumarins and aminocrotonates under solvent-free conditions.
• Authors of publication: Begum, Shahnaz; Kashameni, Sravani; Sridhar, Balasubramanian; Atmakur, Krishnaiah; Bhimapaka, China Raju
• Journal of publication: Organic & biomolecular chemistry
• Year of publication: 2025
• Journal volume: 23
• Journal issue: 6
• Pages of publication: 1443 - 1447
• a: 6.475 ± 0.0003 Å
• b: 8.0563 ± 0.0004 Å
• c: 27.3771 ± 0.0014 Å
• α: 90°
• β: 92.317 ± 0.003°
• γ: 90°
• Cell volume: 1426.95 ± 0.12 ų
• Cell temperature: 294 ± 2 K
• Ambient diffraction temperature: 294 ± 2 K
• Number of distinct elements: 3
• Space group number: 14
• Hermann-Mauguin space group symbol: P 1 21/n 1
• Hall space group symbol: -P 2yn
• Residual factor for all reflections: 0.0821
• Residual factor for significantly intense reflections: 0.0455
• Weighted residual factors for significantly intense reflections: 0.1066
• Weighted residual factors for all reflections included in the refinement: 0.1266
• Goodness-of-fit parameter for all reflections included in the refinement: 1.029
• Diffraction radiation wavelength: 0.71073 Å
• Diffraction radiation type: MoKα
• Has coordinates: Yes
• Has disorder: No
• Has Fobs: No