Acta Cryst. (2007). E63, o1153-o1154  [ doi:10.1107/S1600536807004461 ]

[N-(Phosphonomethyl)ethylammonio]methylphosphonate

S.-M. Ying, J.-Y. Lin, G.-P. Zhou, Q.-Y. Luo and J.-H. Wu

Abstract: The title compound, C₅H₁₅NO₆P₂, exists as a zwitterion. The N atom of the amino group is protonated and one of the phosphonic acid groups is deprotonated. The molecules form hydrogen-bonded (202) layers.

Online 7 February 2007

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