Acta Cryst. (2013). E69, o1829-o1830 [ doi:10.1107/S1600536813031620 ]
Abstract: The title compound, C5H11NO2·H2O, is an isomer of the -amino acid valine that crystallizes from water in its zwitterion form as a monohydrate. It is not one of the 20 proteinogenic amino acids that are used in living systems and differs from the natural amino acids in that it has no -H atom. The compound exhibits hydrogen bonding between the water molecule and the carboxylate O atoms and an amine H atom. In addition, there are intermolecular hydrogen-bonding interactions between the carboxylate O atoms and amine H atoms. In the crystal, these extensive N-HO and O-HO hydrogen bonds lead to the formation of a three-dimensional network.
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