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During the development of novel energetic materials first analysis of synthesized compound includes both physico-chemical characterization and energetic potential evaluation. Evaluation of energetic performance includes determination of the detonation parameters,...

The azo-coupling of 1- and 2-amino-4-nitro-1,2,3-triazole yielded two new energetic compounds whose detonation properties compete with that of HMX. Though the calculated performances are impressive, the regioisomers have differing sensitivities and detonation behavior. One has sensitivities similar to a very sensitive primary explosive, while the other has sensitivities more comparable to a sensitive secondary explosive. This serves as an example of the ability to tailor the sensitivities and end use of energetic compounds via regioisomerization.

Fully characterized energetic material containing a unique zwitterionic dinitromethyl functional group.

Energetic N‐amino‐C‐nitro compounds 1‐amino‐4‐nitro‐1,2,3‐triazole and 2‐amino‐4‐nitro‐1,2,3‐triazole are characterized for the first time as energetic materials. These compounds were characterized chemically by nuclear magnetic resonance (NMR), Infrared spectroscopy and X‐ray crystallography. Compounds were also characterized energetically by differential scanning calorimetry (DSC), impact, and friction and found to possess sensitivities and performances classifying them as primary explosives with PETN‐like performance.

The Cover Feature shows amino‐4‐nitro‐1,2,3‐triazole isomers. These compounds were characterized as energetic materials for the first time and found to be primary explosives with PETN‐like performance. While often in this field long and difficult syntheses translate to new energetic materials that are expensive, these compounds are readily available and good precursor to new potentially high‐performing energetic derivatives. More information can be found in the Full Paper Dominique R. Wozniak et al.

A new efficient synthesis of 5-bromotetrazole is presented. The free acid bromotetrazole was synthesized in a straightforward reaction analogous to the production of nitrotetrazole. Its sodium salt was readily produced via acid/base salt metathesis.Both products were characterized chemically and as energetic materials by 1 H and 13 C NMR, IR, High Resolution Mass Spectrometry, x-ray crystallography, TGA, impact and friction tests.

In the Results and Discussion section under synthesis, "A solution of sodium nitrite doped with copper sulfate pentahydrate was slowly added to a solution of 5-aminotetrazole and copper sulfate pentahydrate" is incorrect and should read, "A solution of sodium nitrite doped with copper sulfate pentahydrate was slowly added to an acidic solution of 5-aminotetrazole, potassium bromide, and copper sulfate pentahydrate."In the Experimental section, the synthesis of 5-bromotetrazole (1), "A solution of 5.25g (0.0761 mol) NaNO 2 , 0.3 g (1.2 mmol) CuSO 4 pentahydrate, and 90 mL water was added to a solution at 5-10°C of 6.38 g (0.0748 mol) 5-amino-1H-tetrazole, 9 mL 70% HNO 3 , 6.75g (0.0270 mol) CuSO 4 pentahydrate over 1 hour with stirring" is incorrect and should read, "A solution of 5.25 g (0.0761 mol) NaNO 2 , 0.3 g (1.2 mmol) CuSO 4 pentahydrate, and 90 mL water was added to a solution at 5-10oC of 6.38 g (0.0748 mol) 5-amino-1H-tetrazole, 9 mL 70% HNO 3 , 57 g (0.479 mol) KBr, 6.75 g (0.0270 mol) CuSO 4 pentahydrate over 1 hour with stirring."