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Acta Cryst. (2014). C70, 323-325  [ doi:10.1107/S2053229614002447 ]

The structural properties of a noncentrosymmetric polymorph of 4-amino­benzoic acid

R. Benali-Cherif, R. Takouachet, E.-E. Bendeif and N. Benali-Cherif

Synopsis: The first noncentrosymmetric polymorph of 4-amino­benzoic acid (PABA) is described. The two crystallographically independent PABA mol­ecules form pseudocentrosymmetric O-H...O hydrogen-bonded dimers that are further linked by N-H...O hydrogen bonds into a three-dimensional network.

Formula: C7H7NO2


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