[Open access]

[Contents scheme]

Acta Cryst. (2013). E69, o1667-o1668
[ doi:10.1107/S160053681302727X ]

Bis(L-serinium) oxalate dihydrate: polymorph II

M. Kulik, A. Pazio and K. Wozniak

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-H...O-, O-H...O and N+-H...O-hydrogen bonds link the components of the structure. The L-serinium cations and oxalate anions form a network of channels in [100] 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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