Acta Cryst. (2007). E63, o1269-o1270  [ doi:10.1107/S1600536807006241 ]

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

G. R. Bardajee, M. A. Winnik and A. J. Lough

Abstract: In the title molecule, C₁₁H₈O₅, 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-HO hydrogen bonds form chains of rings propagating in the [210] direction.

Online 14 February 2007

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