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Acta Cryst. (2013). C69, 934-936  [ doi:10.1107/S0108270113018143 ]

The zwitterionic structure of 2-hydroxy-4-[(2-hydroxybenzylidene)amino]benzoic acid

A. A. B. C. Júnior, G. S. G. De Carvalho, L. F. Marques, C. C. Corrêa, A. D. Da Silva and F. C. Machado

Synopsis: The title compound exists in a zwitterionic form. There is a strong intramolecular N-H...O hydrogen bond, an intramolecular O-H...O hydrogen bond, an intermolecular C-H...O contact and [pi]-[pi] stacking interactions, resulting in a three-dimensional network.

Formula: C14H11NO4


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