Grishkevich-Trokhimovskii, E. published the artcileThe action of nitrous acid on the nitrile of aminomalonic acid. II. Structure of dicyanotriazole, Synthetic Route of 53817-16-6, the publication is J. Russ. Phys.-Chem. Soc. (1924), 551-3, database is CAplus.
The white modification of II (above) obtained by sublimation near the m. p., remains white when recrystallized from Et2O, turning yellow when crystallized from H2O. Attempts to disclose a difference in structure by preparing derivatives of either modification were frustrated. With CH2N2 at 0° both were converted to the same methyldicyanotriazole, any mol. rearrangement being excluded at so low a temperature Saponification of II with 10% aqueous NaOH at 70° produces monocyanotriazolecarboxylic acid, m. 215-6° (decomposition); Ag salt, white cheese-like precipitate At a higher concentration and temperature II is converted to monoaminotriazolecarboxylic acid. C4N5Me saponified with strong H2SO4 gave acid (IV), m. 202.5-3.5°, from whose Ag salt with Mel was obtained the Me ester (V), m. 66-7°. Me ester (VI) of triazoledicarboxylic acid, prepared by this method, m. 83.5-84°; a mixture of V and VI m. 55-60°. Conclusion: the Me group of IV is attached to N, therefore, also in C4N5Me. The investigation is being continued.
J. Russ. Phys.-Chem. Soc. published new progress about 53817-16-6. 53817-16-6 belongs to triazoles, auxiliary class Triazoles, name is 1H-1,2,3-Triazole-4,5-dicarbonitrile, and the molecular formula is C4HN5, Synthetic Route of 53817-16-6.
Referemce:
https://en.wikipedia.org/wiki/1,2,3-Triazole,
Triazoles – an overview | ScienceDirect Topics