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7-Meth­oxy-2-oxo-2H-chromene-3-carboxylic acid

✍ Scribed by Bardajee, Ghasem Rezanejade ;Winnik, Mitchell A. ;Lough, Alan J.

Publisher
International Union of Crystallography
Year
2007
Tongue
English
Weight
165 KB
Volume
63
Category
Article
ISSN
1600-5368

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✦ Synopsis

In the title molecule, C~11~H~8~O~5~, the non-H atoms of the coumarin unit are essentially coplanar; the methoxy and carboxylate groups form dihedral angles of 6.5 (4) and 6.7 (4)°, respectively, with this group. In the crystal structure, weak intermolecular C—H...O hydrogen bonds form chains of rings propagating in the [210] direction.

📜 SIMILAR VOLUMES

7-Diethyl­amino-2-oxo-2H-chromene-3-carb
7-Diethyl­amino-2-oxo-2H-chromene-3-carboxylic acid
✍ Bardajee, Ghasem Rezanejade ;Winnik, Mitchell A. ;Lough, Alan J. 📂 Article 📅 2006 🏛 International Union of Crystallography 🌐 English ⚖ 292 KB

In the title molecular structure, C~14~H~15~NO~4~, all non-H atoms, except for the C atoms of the terminal methyl groups of the diethylamino substituents, are essentially coplanar. In the crystal structure, a two-dimensional network is formed __via__ weak intermolecular C—H...O hydrogen bonds and π–

Succinimidyl 7-meth­oxy-2H-chromene-3-ca
Succinimidyl 7-meth­oxy-2H-chromene-3-carboxyl­ate
✍ Bardajee, Ghasem Rezanejade ;Winnik, Mitchell A. ;Lough, Alan J. 📂 Article 📅 2007 🏛 International Union of Crystallography 🌐 English ⚖ 254 KB

In the title molecule, C~15~H~11~NO~7~, the dihedral angle between the coumarin unit and the succinimide unit is 72.36 (4)°. The crystal structure is stabilized by weak intermolecular C—H...O hydrogen bonds and π–π stacking interactions.

Potassium (4-methyl-2-oxo-2H-chromen-7-y
Potassium (4-methyl-2-oxo-2H-chromen-7-yl­oxy)sulfate
✍ Sierosławski, Krzysztof ;Ślepokura, Katarzyna ;Lis, Tadeusz 📂 Article 📅 2006 🏛 International Union of Crystallography 🌐 English ⚖ 204 KB

Single-crystal X-ray study T = 100 K Mean (C-C) = 0.004 A R factor = 0.056 wR factor = 0.105 Data-to-parameter ratio = 12.2 For details of how these key indicators were automatically derived from the article, see http://journals.iucr.org/e.

5-Hydr­oxy-7-meth­oxy-2,6,8-trimethyl-4H
5-Hydr­oxy-7-meth­oxy-2,6,8-trimethyl-4H-chromen-4-one
✍ Fun, Hoong-Kun ;Chantrapromma, Kan ;Pullaput, Yupparase ;Boonnak, Nawong ;Chantr 📂 Article 📅 2007 🏛 International Union of Crystallography 🌐 English ⚖ 276 KB

The title compound, C 13 H 14 O 4 , known as 8-methyleugenitin, is a chromone isolated from the leaves of Mellaleuca cajuputi Powell. The chromone unit is essentially planar. The methyl and hydroxyl groups lie in the plane of the benzene ring while the methoxy substituent is perpendicular to it. An