1,4-Dimethylpiperazin-1-ium 3-hydroxy-2-naphthoate

The reaction of 1,4-dimethylpiperazine and 3-hydroxy-2-naphthoic acid gives the title 1:1 salt, C6H15N2+·C11H7O3 , with a singly protonated piperazinium cation. In the crystal, a single N—H...O hydrogen bond links the cations and anions into discrete pairs and the aromatic anions stack along the crystallographic a-axis direction. This results in layers of cations and anions alternating along the crystallographic c-axis direction. An intramolecular O—H...O hydrogen bond is also present.