Crystal structure of a 1:1 salt of 4-amino-benzoic acid (vitamin B₁₀) with pyrazinoic acid.

ABSTRACT: The title 1:1 salt, C₇H₈NO₂ ⁺·C₅H₃N₂O₂ ^- (systematic name: 4-carb-oxy-anilinium pyrazine-2-carboxyl-ate), was synthesized successfully by slow evaporation of a saturated solution from water-ethanol (1:1 v/v) mixture and characterized by X-ray diffraction (SCXRD, PXRD) and calorimetry (DSC). The crystal structure of the salt was solved and refined at 150 and 293 K. The salt crystallizes with one mol-ecule of 4-amino-benzoic acid (PABA) and one mol-ecule of pyrazinoic acid (POA) in the asymmetric unit. In the crystal, the PABA and POA mol-ecules are associated via COOH⋯N_arom heterosynthons, which are connected by N-H⋯O hydrogen bonds, creating zigzag chains. The chains

SUBMITTER: Drozd KV 

PROVIDER: S-EPMC6281118 | biostudies-literature | 2018 Dec

REPOSITORIES: biostudies-literature