Acta Cryst. (2003). E59, o447-o449  [ doi:10.1107/S1600536803004203 ]

Zwitterionic 2-guanidinium-1-aminocarboxylate monohydrate

T. Kolev and R. Petrova

Abstract: It is found that the commercial product with formula C₂H₈N₄O₃, supposedly aminoguanidinium hydrogen carbonate, is actually a monohydrate of aminoguanidinium betaine. In the zwitterion, the guanidinium and NHCO₂ groups are planar and nearly perpendicular to each other, with a dihedral angle of 83.26  (5)°. The crystal structure can be thought of as composed of layers of organic molecules alternating with layers of water molecules. The structural units are held together by an extensive hydrogen-bonding network.

Online 14 March 2003

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