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In the structure of the title compound, C10H6O4, there is a single intramolecular hydrogen bond. In addition, there are a number of significant intermolecular C-H...O attractive interactions. These interactions account in part for the rather high density for an ordinary carboxylic acid, 1.522 Mg m−3.

Supporting information

cif

Crystallographic Information File (CIF)
Contains datablocks global, coumarin-3-carboxylic_acid

hkl

Structure factor file (CIF format)
Supplementary material

CCDC reference: 128289

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