Crystal structure of quinolinium 2-carboxy-6-nitrobenzoate monohydrate

Abstract

In the anion of the title hydrated molecular salt, C9H8N+·C8H4NO6-·H2O, the protonated carboxyl and nitro groups makes dihedral angles of 27.56 (5) and 6.86 (8)°, respectively, with the attached benzene ring, whereas the deprotonated carboxy group is almost orthogonal to it with a dihedral angle of 80.21 (1)°. In the crystal, the components are linked by O - H⋯O and N - H⋯O hydrogen bonds, generating [001] chains. The packing is consolidated by weak C - H⋯N and C - H⋯O interactions as well as aromatic π-π stacking [centroid-to-centroid distances: 3.7023 (8) & 3.6590 (9)Å] interactions, resulting in a three-dimensional network.