The crystal structure of the ammonium salt of 2‐aminomalonic acid.

The salt ammonium 2‐aminomalonate (systematic name: ammonium 2‐azaniumylpropanedioate), NH4+·C3H4NO4−, was synthesized in diethyl ether from the starting materials malonic acid, ammonia and bromine. The salt was recrystallized from water as colourless blocks. In the solid state, intramolecular medium–strong N—H...O, weak C—H...O and weak C—H...N hydrogen bonds build a three‐dimensional network. [ABSTRACT FROM AUTHOR]