GALDÁMEZ, ANTONIOGARCÍA-BELTRÁN, OLIMPOCASSELS, BRUCE K.2016-07-192016-07-192011J. Chil. Chem. Soc. vol.56 no.1 Concepción 20110717-9707http://dx.doi.org/10.4067/S0717-97072011000100005http://repositorio.unab.cl/xmlui/handle/ria/1097Indexación: Web of Science; ScieloThe crystal structure of ethyl 7-hydroxy-2-oxo-2H-chromene-3-carboxylate monohydrate (1), C12H10O5.H2O, was established by X-ray crystallographic analysis. The molecule of the title compound is essentially planar except for the carboxylate substituent group. The crystal packing supramolecular array arises from hydrogen bonds and intermolecular C-H - O=C contacts of the organic molecules and solvent water molecules, with graph-set descriptor R24 (8), R21 (6), R44 ( 20) and C (5) motifs. The water molecules are involved as donors and acceptors. The hydrogen bond and intermolecular interaction network is reinforced by stacking of the sheet through p-p interactions.enCrystal structureCoumarinsX-ray diffractionArtículo