Synthesis and stability of 2-tetrazenium salts

(E)‐1,1,4,4‐Tetramethyl‐2‐tetrazene (TMTZ): A Prospective Alternative to Hydrazines in Rocket Propulsion

“…We observed a progressive increase in the UV/Vis absorptions at λ =236 and 325 nm (Figure ). In order to identify the nature and the origin of these two species, we decided to study the stability i) of TMTZ in the reaction conditions (25 °C; pH 8) without any other reagent, ii) of TMTZ in the presence of NH 2 Cl (25 °C; pH 8), iii) of TMTZ in the presence of UDMH (25 °C; pH 8), and UDMH at 25 °C and pH 8 (Supporting Information Figure SI6 and SI7).The concentration [TMTZ] diminishes in the borax–HCl buffer used to set the pH 8 probably due to the protonation of TMTZ (p K b (TMTZ)=7.78) and the instability of the resulting product . However this degradation is relatively slow (−31 % in 18 h).…”

Energetic Ionic Liquids as Explosives and Propellant Fuels: A New Journey of Ionic Liquid Chemistry

“…A new class of EILs based on the 2-tetrazenium cation has also been reported. , As is seen in Scheme ( AM-40 – AM-43 ), the oxidation of 1,1-dimethylhydrazine leads to the formation of ( E )-1,1,4,4-tetramethyl-2-tetrazene, followed by quaternization to form the desired 2-tetrazenium cations. Metathesis reactions of 2-tetrazenium halide salts with energetic anions lead to the formation of EILs based on the 2-tetrazenium cation and anions including nitrate, perchlorate, 5,5′-azobis­(tetrazolate), picrate, and azide.…”

Study of picrate salts with amines

“…The crystal structures of picrate salts with amines have been studied in the past [6][7][8][9][10] but the mechanism of thermal analysis, explosion delay measurement are not yet reported in literature. When the picric acid is combined with amines, the resultant salts undergoes self propagative decomposition reaction due to the presence of both oxidizing (picric acid) and reducing (amines) groups in the same molecule.…”