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In the title compound, C8H8N4-C8H8N4, two tautomers, viz. 3-phenyl-1,2,4-triazol-5-amine and 5-phenyl-1,2,4-triazol-3-amine, are crystallized together in equal amounts. The 3-phenyl-1,2,4-triazol-5-amine molecule is essentially planar; the phenyl ring makes a dihedral angle of 2.3 (2)degrees with the mean plane of the 1,2,4-triazole ring. In the 5-phenyl-1,2,4-triazol-3-amine tautomer, the mean planes of the phenyl and 1,2,4-triazole rings form a dihedral angle of 30.8 (2)degrees. The electron delocalization of the amino group with the 1,2,4-triazole nucleus in the 3-phenyl-1,2,4-triazol-5-amine molecule is more extensive than that in the 5-phenyl-1,2,4-triazol-3-amine tautomer. The molecules are linked into a two-dimensional network parallel to (100) by N-H...N hydrogen bonds.
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Heterocyclic compounds based on 3-(4-bromophenyl) azo-5-phenyl-2(3H)- furanone: Anti-avian influenza virus (H5N1) activityFlefel, E.; Abdel-Mageid, R.; Tantawy, W.; Ali, Mohammed; Amr, A. (2012)3-[2-(4-Bromphenyl)hydrazono]-5-phenyl-furan-2(3H)-one (1) was used for preparation of some novel pyrazole, pyridazinone, oxadiazole, triazole, thiazolidine and thioxopyrimidine derivatives. Some of the prepared products ...
Dolzhenko, Anton; Tan, G.; Koh, L.; Dolzhenko, A.; Chui, W. (2010)The title compound, C12H13N5O2S, exists in the 3-phenyl-5-thioureido-1H-1,2,4-triazole tautomeric form stabilized by intramolecular hydrogen bonding between the endocyclic NH H atom and the thioureido S atom. The molecular ...
Dolzhenko, Anton; Tan, G.; Koh, L.; Dolzhenko, A.; Chui, W. (2007)The title compound, C12H14N6, was synthesized via cyclocondensation of 5-guanidino-3-phenyl-1,2,4-triazole with acetone. Only one tautomeric form with the NH H atom vicinal to the methyl groups was observed in the crystal ...