3-Carboxy-5-(pyridinium-4-yl)benzoate: a redetermination

Authors：Li Shi Jie; Miao Dong Liang; Song Wen Dong^*; Tong Shao Wei

Source：Acta Crystallographica Section E: Structure Reports Online , 2011, 67.

DOI：10.1107/S1600536811016394

The title compound, C(13)H(9)NO(4), crystallizes in a zwitterionic form with the pyridine N atom protonated and the carboxyl OH group deprotonated. The benzene and pyridinium rings are inclined with a dihedral angle of 31.42 (14)degrees between them. A previous report of this stucture claims, we believe incorrectly, that neither of the carboxylate groups is deprotonated [Zhang et al. (2010). Acta Cryst. E66, o2928-o2928]. In the crystal, intermolecular O-H...O, N-H...O and weak C-H...O hydrogen-bonding interactions link adjacent molecules into a three-dimensional supramolecular network.

• Institution
  广东海洋大学