Structural Characterization and Thermal Behavior of 1-Amino-1-methylamino-2,2-dinitroethylene |
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| Authors: | Xu Kangzhen Wang Feng Ren Yinghui Li Wenhong Zhao Fengqi Chang Chunran Song Jirong |
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| Affiliation: | 1. Department of Chemical Engineering, Northwest University, Xi'an, Shaanxi 710069, China;2. Xi'an Modern Chemistry Research Institute, Xi'an, Shaanxi 710065, China;3. Conservation Technology Department, the Palace Museum, Beijing 100009, China |
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| Abstract: | A novel high energetic material, 1‐amino‐1‐methylamino‐2,2‐dinitroethylene (AMFOX‐7), was synthesized through 1,1‐diamino‐2,2‐dinitroethylene (FOX‐7) reacting with methylamine in N‐methyl pyrrolidone (NMP) at 80.0°C, and its structure was determined by single crystal X‐ray diffraction. The crystal is monoclinic, space group P21/m with crystal parameters of a=6.361(3) Å, b=7.462(4) Å, c=6.788(3) Å, β=107.367(9)°, V=307.5(3) Å3, Z=2, µ=0.160 mm?1, F(000)=168, Dc=1.751 g·cm?3, R1=0.0463 and wR2=0.1102. Thermal decomposition of AMFOX‐7 was studied, and the enthalpy, apparent activation energy and pre‐exponential constant of the exothermic decomposition reaction are 303.0 kJ·mol?1, 230.7 kJ·mol?1 and 1021.03 s?1, respectively. The critical temperature of thermal explosion is 245.3°C. AMFOX‐7 has higher thermal stability than FOX‐7. |
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| Keywords: | 1,1‐diamino‐2,2‐dinitroethylene (FOX‐7) 1‐amino‐1‐methylamino‐2,2‐dinitroethylene (AMFOX‐7) methylamine crystal structure thermal behavior |
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