Gallic acid pyridine monosolvate.
IN THE TITLE COMPOUND (SYSTENATIC NAME: 3,4,5-trihy-droxy-benzoic acid pyridine monosolvate), C(5)H(5)N·C(7)H(6)O(5), the gallic acid mol-ecule is essentially planar (r.m.s deviation = 0.0766 Å for non-H atoms) and is linked to the pyridine mol-ecule by an O-H⋯N hydrogen bond. An intra-molecular O-H⋯O hydrogen bond occurs in the gallic acid mol-ecule. The gallic acid and pyridine mean planes make a dihedral angle 12.6 (3)°. Inter-molecular O-H⋯O and O-H⋯N hydrogen bonding involving the hy-droxy and carboxyl groups and the pyridine mol-ecule, and π-π inter-actions between inversion-related pyridines [centroid-centroid distance = 3.459 (6) Å] and between pyridine and benzene rings [centroid-centroid distance = 3.548 (6) Å], lead to a three-dimensional network in the crystal.
Guangdong Province Key Laboratory of Pharmacodynamic Constituents of Traditional Chinese Medicine and New Drugs Research, Institute of Traditional Chinese Medicine and Natural Products, Jinan University, Guangzhou 510632,  People's Republic of China.
Fu-Yue
FY
Dong
Jie
J
Wu
Hai-Yan
HY
Tian
Qing-Mei
QM
Ye
Ren-Wang
RW
Jiang