TRIAZOLES (pyrro-a and (3'-diazoles), in organic chemistry, a series of heterocyclic compounds containing the ring complex (annexed formula).
In a similar manner, formic acid and dicyanophenylhydrazine yields a phenyl-triazole carboxylic acid, in which the phenyl group may be nitrated, the nitro group reduced to the amino group, and the product oxidized to a triazole carboxylic acid, which, by elimination of carbon dioxide, yields the free triazole: HO 2 C C=N H02C C =N, NPh-> N :CH N :CH They also result when the acidylthiosemicarbazides are strongly heated, the mercapto-triazoles so formed being converted into triazoles on oxidation with hydrogen peroxide (M.
The triazoles behave as weak bases, the imido-hydrogen being replaceable by metal.
Isomeric triazoles of the following constitutions are known:- HC :N N :CH N-N?
The iminobiazoles are formed by conversion of diacylhydrazines into iminochlorides which with ammonia or bases yield the required triazoles (R.