期刊
ACTA CRYSTALLOGRAPHICA SECTION E-STRUCTURE REPORTS ONLINE
卷 63, 期 -, 页码 O4836-U6236出版社
BLACKWELL PUBLISHING
DOI: 10.1107/S1600536807058965
关键词
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In the crystal structure of the title compound, C17H11NO7, the phenanthrene ring system and the five-membered ring are almost coplanar. The carboxy and nitro groups lie above and below the plane, respectively, owing to steric effects. The hydroxy groups form strong intermolecular O-H center dot center dot center dot O hydrogen bonds with the carbonyl group O atom. The carboxy groups of pairs of molecules form centrosymmetric rings via pairs of intermolecular hydrogen bonds.
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