Synthesis, characterization, and crystal structure of 2-oxo-5-nitro-3-(5-nitroimino-1,3,4-oxadiazole-2-yl)-pyrazine

Abstract

A novel and green energetic compound, 2-oxo-5-nitro-3-(5-nitroimino-1,3,4-oxadiazole-2-yl)-pyrazine, was designed and prepared in this study. It was identified and characterized using X-ray single-crystal diffraction, IR spectroscopy, NMR spectroscopy, mass spectrometry, differential scanning calorimetry, and elemental analysis. The newly developed compound is an insensitive booster explosive with a high detonation velocity (D ​= ​8516 ​m ​s−1), highs detonation pressure (P ​= ​31.85 ​GPa), low mechanical sensitivities (impact sensitivity: 32 ​J, friction sensitivity: > 360 ​N), and excellent thermal stability (decomposition temperature: 270 ​°C). This compound and further studies will greatly boost the application of green energetic materials with improved performance.

Keywords

• Energetic compound
• Pyrazine
• Detonation performance
• Thermal stability
• Low mechanical sensitivity