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

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

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.

Keywords: crystal structure; 4-aminobenzoic acid; PABA; polymorphism; noncentrosymmetric polymorph; hydrogen bonding; pharmaceuticals.

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

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