title: Crystal structure of 8-hy-droxy-quinolin-ium 2-carboxy-6-nitro-benzoate mono-hydrate.
abstract: In the title hydrated salt, C9H8NO(+)·C8H4NO6 (-)·H2O, the deprotonated carboxyl-ate group is almost normal to its attached benzene ring [dihedral angle = 83.56 (8)°], whereas the protonated carboxyl-ate group is close to parallel [dihedral angle = 24.56 (9)°]. In the crystal, the components are linked by N-H⋯O and O-H⋯O hydrogen bonds, generating [001] chains. The packing is consolidated by C-H⋯O and π-π [centroid-to-centroid distances = 3.6408 (9) and 3.6507 (9) Å] inter-actions, which result in a three-dimensional network.
authors.affiliation: Department of Physics, Presidency College, Chennai 600 005, India.
authors.forename: M
authors.initials: M
authors.lastname: Divya Bharathi
authors.affiliation: Department of Physics, Presidency College, Chennai 600 005, India.
authors.forename: G
authors.initials: G
authors.lastname: Ahila
authors.affiliation: Department of Physics, Presidency College, Chennai 600 005, India.
authors.forename: J
authors.initials: J
authors.lastname: Mohana
authors.affiliation: Department of Physics, CPCL Polytechnic College, Chennai 600 068, India.
authors.forename: G
authors.initials: G
authors.lastname: Chakkaravarthi
authors.affiliation: Department of Physics, Presidency College, Chennai 600 005, India.
authors.forename: G
authors.initials: G
authors.lastname: Anbalagan
keywords: 2-carboxy-6-nitro­benzoate; 8-hy­droxy­quinolinium; crystal structure; hydrogen bonding; π–π inter­actions