Crystal structure of piperidinium 4-nitro­phenolate

In the title salt, the piperidine ring of the cation adopts a chair conformation. In the crystal, N—H...O hydrogen bonds link adjacent anions and cations into infinite chains along [100]. The chains are linked by C—H...π inter­actions, forming sheets lying parallel to (001).

Crystal structure of 2-phenyl­ethyl­amin­ium 4-nitro­phenolate monohydrate

In the title hydrated mol­ecular salt, C₈H₁₂N⁺·C₆H₄NO₃⁻·H₂O, the conformation of the side chain in the cation is anti [C—C—C—N = 179.62 (12)°] and the dihedral angle between the aromatic ring and the nitro group in the anion is 3.34 (11)°. In the crystal, the components are linked by O—H...O and N—H...O hydrogen bonds, generating (10-1) sheets, which feature R₄⁴(21) loops. The sheets inter­act by weak aromatic π–π stacking inter­actions [centroid–centroid distance = 3.896 (3) Å], forming a three-dimensional network.