MOLECULAR COCRYSTALS OF CARBOXYLIC-ACIDS - XXXI - ADDUCTS OF 2-AMINOPYRIMIDINE AND 3-AMINO-1,2,4-TRIAZOLE WITH HETEROCYCLIC CARBOXYLIC-ACIDS

A series of molecular adducts of 2-aminopyrimidine and 3-amino-1,2,4-t riazole with heterocyclic carboxylic acids have been prepared and char acterized by using X-ray powder diffraction and in four cases by singl e-crystal X-ray diffraction methods. These four compounds are the (1:1 ) adducts of 2-aminopyrimidine with indole-3-acetic acid [(C4H5N3)(C10 H9NO2)], N-methylpyrrole-2-carboxylic acid [(C4H5N3)(C6H7NO2)] and thi ophen-2-carboxylic acid [(C4H5N3)(C5H4O2S)], and the (1 : 1) adduct of 3-amino-1,2,4-triazole with thiophen-2-carboxylic acid [(C2H4N4)(C5H4 O2S)] Other compounds described are the (1 : 1) adducts of 3-amino-1,2 ,4-triazole with indole-3-acetic acid and N-methylpyrrole-2-carboxylic acid.