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Aisa HA, Izotova L, Karimov A, Botirov E, Mamadrahimov A, Ibragimov B. Crystal, mol-ecular structure and Hirshheld surface analysis of 5-hy-droxy-3,6,7,8-tetra-meth-oxy-flavone. Acta Crystallogr E Crystallogr Commun 2020; 76:1748-1751. [PMID: 33209346 PMCID: PMC7643244 DOI: 10.1107/s2056989020013596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Accepted: 10/12/2020] [Indexed: 12/02/2022]
Abstract
The title compound (systematic name: 5-hydroxy-3,6,7,8-tetramethoxy-2-phenyl-4H-chromen-4-one), C19H18O7, is a flavone that was isolated from a butanol extract of the herb Scutellaria nepetoides M. Pop. The flavone mol-ecule is almost planar, with a dihedral angle between the planes of the benzo-pyran-4-one group and the attached phenyl ring of 6.4 (4)°. The 5-hy-droxy group forms a strong intra-molecular hydrogen bond with the carbonyl group, resulting in a six-membered hydrogen-bonded ring. The crystal structure has triclinic (P ) symmetry. In the crystal, the mol-ecules are linked by C-H⋯O hydrogen bonds into a two dimensional network parallel to the ab plane. The Hirshfeld surface analysis indicates that the most important contributions to the crystal packing are from H⋯H (53.9%) and H⋯O/O⋯H (20.9%) inter-actions.
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Affiliation(s)
- Haji Akber Aisa
- Key Laboratory of Plants Resources and Chemistry of Arid Zone, Xinjiang, Technical Institute of Physics and Chemistry, Chinese Academy of Science, Urumqi 830011, People’s Republic of China
| | - Lidiya Izotova
- Institute of Bioorganic Chemistry, UzAS, M. Ulugbek Str., 83, 100125,Tashkent, Uzbekistan
| | - Abdurashid Karimov
- Institute of the Chemistry of Plant Substances, UzAS, M. Ulugbek Str., 77, 100170, Tashkent, Uzbekistan
| | - Erkin Botirov
- Institute of the Chemistry of Plant Substances, UzAS, M. Ulugbek Str., 77, 100170, Tashkent, Uzbekistan
| | - Azimjon Mamadrahimov
- Institute of Bioorganic Chemistry, UzAS, M. Ulugbek Str., 83, 100125,Tashkent, Uzbekistan
| | - Bahtiyar Ibragimov
- Institute of Bioorganic Chemistry, UzAS, M. Ulugbek Str., 83, 100125,Tashkent, Uzbekistan
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