Acta Cryst. (2013). E69, o1667-o1668 [ doi:10.1107/S160053681302727X ]
Abstract: A corrected and improved structure of the polymorph II of 2C3H8NO3+·C2O42-·2H2O, based on single-crystal data, is presented. The structure is refined with anisotropic displacement parameters for all non-H atoms and all H atoms are located. Due to the charged moieties, the structure is classified as a molecular salt. Intermolecular O-HO-, O-HO and N+-HO-hydrogen bonds link the components of the structure. The L-serinium cations and oxalate anions form a network of channels in  direction, filled with the water molecules of crystallization. The dihedral angle between the CO2 units of the oxalate dianion is 10.2 (3)°
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