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Acta Cryst. (2005). E61, o2042-o2044 [ doi:10.1107/S1600536805017496 ]
Abstract: The title compound, C4H9N2O3+·NO3-, crystallizes with two asparaginium cations and two nitrate anions in the asymmetric unit. In both asparaginium residues, protonation take place at the carboxyl O atom cis to the amine group. Cation I exists in a trans conformation, whereas cation II exhibits a gauche I conformation. A straight head-to-tail sequence is observed for one of the asparaginium cations. The crystal structure is stabilized by inter- and intramolecular hydrogen bonding.
Online 10 June 2005
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