title: 4-Methyl-pyridinium 4-hy-droxy-benzoate.
abstract: In the crystal structure of the title salt, C(6)H(8)N(+)·C(7)H(5)O(3) (-), the anions and cations are linked by classical N-H⋯O hydrogen bonds. The anions are connected by pairs of C-H⋯O hydrogen bonds into inversion dimers and further linked by classical O-H⋯O hydrogen bonds. Weak π-π inter-actions [centroid-centroid distances = 3.740 (3) and 3.855 (3) Å] also occur. The dihedral angle between the CO(2) (-) group and the benzene ring to which it is attached is 20.95 (8)°.
authors: Department of Physics, Presidency College, Chennai 600 005,  India.
authors: S
authors: S
authors: Sudhahar
authors: M
authors: M
authors: Krishnakumar
authors: B M
authors: BM
authors: Sornamurthy
authors: G
authors: G
authors: Chakkaravarthi
authors: R
authors: R
authors: Mohankumar