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(3E)-11,16-Dioxatricyclo[15.4.0.0(5,10)]henicosa-1(21),3,5,7,9,17,19-heptaen-2-one
The title compound, C(19)H(18)O(3), crystallizes with three molecules (A, B and C) in the asymmetric unit. The carbonyl O atom shows positional disorder over two sites in molecules A and B; the site-occupancy ratios are 0.76 (3):0.24 (3) and 0.86 (3):0.14 (3), respectively. The ethylene fragments...
| Autores principales: | , , , , |
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| Formato: | Online Artículo Texto |
| Lenguaje: | English |
| Publicado: |
International Union of Crystallography
2013
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| Materias: | |
| Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3588484/ https://www.ncbi.nlm.nih.gov/pubmed/23476611 http://dx.doi.org/10.1107/S1600536813000299 |
| Sumario: | The title compound, C(19)H(18)O(3), crystallizes with three molecules (A, B and C) in the asymmetric unit. The carbonyl O atom shows positional disorder over two sites in molecules A and B; the site-occupancy ratios are 0.76 (3):0.24 (3) and 0.86 (3):0.14 (3), respectively. The ethylene fragments in each molecule have an E conformation, while the C—O—C—C torsion angles indicate near planarity. The dihedral angles formed by the aromatic rings are 20.0 (1), 23.7 (1) and 16.1 (1)° for molecules A, B and C, respectively. Intramolecular C—H⋯O hydrogen bonds occur in each molecule. |
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