MOLECULAR COCRYSTALS OF CARBOXYLIC-ACIDS .9. CARBOXYLIC-ACID INTERACTIONS WITH ORGANIC HETEROCYCLIC BASES - THE CRYSTAL-STRUCTURES OF THE ADDUCTS OF (2,4-DICHLOROPHENOXY)ACETIC ACID WITH 3-HYDROXYPYRIDINE, 2,4,6-TRINITROBENZOIC ACID WITH 2-AMINOPYRIMIDINE, AND 4-NITROBENZOIC ACID WITH 3-AMINO-1,2,4-TRIAZOLE

The cocrystal adducts of a number of carboxylic acids with organic heterocyclic bases have been prepared, and their structures and intermolecular interactions interpreted through X-ray diffraction and infrared spectroscopic techniques. The crystal structures of three of these compounds, the 1:1 adducts [{(2,4-dichlorophenoxy)acetic acid}(3-hydroxypyridine)] (1), [(2,4,6-trinitrobenzoic acid)(2-aminopyrimidine)] (2), and [(4-nitrobenzoic acid)(3-amino-1, 2,4-triazole)] (3), have been determined by single-crystal X-ray diffraction and refined to residuals R 0.026, 0.033 and 0.040 for 1814, 1531 and 727 observed reflections, respectively.