Heterocyclization of hydrazine-1,2-bis(N-2-nitrocarboximidamide) and salts derived therefrom provides a procedure for the synthesis of 3,5-bis(nitroamino)-1,2,4-triazole salts. The presence of two acceptor nitroamino groups conjugated with the triazole ring considerably enhances the acidity of 3,5-bis(nitroamino)-1,2,4-triazole (pK(a)(1) = -2.0, pK(a)(2) = 4.8, pK(a)(3) = 10.6) as compared to mononitroaminotriazole, so that formation of salts with the corresponding dianion becomes possible.
Heterocyclization of hydrazine-1,2-bis(N-2-nitrocarboximidamide) and salts derived therefrom provides a procedure for the synthesis of 3,5-bis(nitroamino)-1,2,4-triazole salts. The presence of two acceptor nitroamino groups conjugated with the triazole ring considerably enhances the acidity of 3,5-bis(nitroamino)-1,2,4-triazole (pK(a)(1) = -2.0, pK(a)(2) = 4.8, pK(a)(3) = 10.6) as compared to mononitroaminotriazole, so that formation of salts with the corresponding dianion becomes possible.
1,2-Dinitroguanidine is a product of nitroguanidine nitration with nitric acid and its mixtures with sulfuric acid and oleum. It is a diacid (pK(a), 1.11, similar to 11.5) and at the same time a weak base undergoing protonation at the nitrogen of the amino group (pK(BH) + -5.81). The decomposition kinetics of 1,2-dinitro-guanidine was studied by spectrophotometric method both in acid and alkaline media, and the mechanism of the process was assumed. In the media of high acidity (H-o > -8) the 1,2-dinitroguanidine suffers reversible denitration into nitroguanidine. At lower acidity its conjugate acid or molecular form undergoes hydrolysis yielding nitrourea. Monoanion of 1,2-dinitroguanidine in a weak acid or in an alkali is hydrolyzed into N,N'-dinitrourea. The reaction of 1,2-dinitroguanidine with alkali in alcohol provides its salts, with nitrogen-containing bases form both salts and derivatives of 2-nitroguanidine. The treatment of 1,2-dinitroguanidine with haloalkanes results in its N-alkylated products.