Synthesis and thermal analysis of 2-methyl-4,5-dicyano-2H-1,2,3-triazole
2-Methyl-4,5-dicyano-2H-1,2,3-triazole was synthesized with 4,5-dicyano-2H-1,2,3-triazole as the raw material for the first time. Its structure was characterized by elemental analysis, infrared spectrum, and nuclear magnetic resonance spectrum. The thermal stability of 2-methyl-4,5-dicyano-2H-1,2,3-triazole was investigated by TG–DSC technique. Its kinetic parameters including activation energy and pre-exponential factor were calculated by Kissinger equation. The combustion heat, heat of formation, impact and friction sensitivity of 2-methyl-4,5-dicyano-2H-1,2,3-triazole were measured. Also, 2-methyl-4-acylamino-5-cyano-2H-1, 2,3-triazole was formed by the hydrolysis of one of the cyano groups of the 2-methyl-4,5-dicyano-2H-1,2,3-triazole, and its single crystal was cultivated. The molecular structure of 2-methyl-4-acylamino-5-cyano-2H-1,2,3-triazole was determined using X-ray diffraction [triclinic P-1, a = 4.956(2) Å, b = 10.058(5) Å, c = 14.142(7) Å, β = 91.169(4)°, V = 658.7(6) Å3, Z = 4]. It exhibited potential application prospect in gas generant, explosive, and solid propellant field.
Keywords2-Methyl-4,5-dicyano-2H-1,2,3-triazole Synthesis Crystal structure Thermal analysis Performance
This work was financially supported by the basic research fund of Beijing Institute of Technology (20130242017) and the project fund of State Key Laboratory of Explosion Science and Technology (Beijing Institute of Technology) (YBKT16-09).
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