Different packing motifs in the crystal structures of three mol-ecular salts containing the 2-amino-5-carb-oxy-anilinium cation: CHNO ·Cl, CHNO ·Br and CHNO ·NO ·HO.

The syntheses and crystal structures of three mol-ecular salts of protonated 3,4-di-amino-benzoic acid, . 2-amino-5-carb-oxy-anilinium chloride, CHNO ·Cl, (I), 2-amino-5-carb-oxy-anilinium bromide, CHNO ·Br, (II), and 2-amino-5-carb-oxy-anilinium nitrate monohydrate, CHNO ·NO ·HO, (III), are described. The cation is protonated at the -N atom (with respect to the carb-oxy group) in each case.