The thermochemical stability of monosubstituted furoxan was investigated with the participation of the researchers from the ZIOC

Thermal stability is an important property of chemical compounds. The use of thermokinetic methods for the analysis of substances makes it possible to describe the mechanism of their thermal transformations, as well as to predict their behavior under the temperature conditions of interest. However, in the case of real objects, thermal transformations of most molecules are complicated by phase transitions, side chemical reactions, and effects of heterogeneity, so performing accurate and reliable kinetic analysis becomes a nontrivial task.

Researchers of the Laboratory of Nitrogen-Containing Compounds of the Zelinsky Institute in collaboration with colleagues from the N.N. Semenov Federal Research Center of Chemical Physics studied a wide range of thermal transformations of 3-monomethylfuroxan – one of the few stable monosubstituted furoxans with promising energetic properties. The study of the thermal stability and the path of decomposition of 3-monomethylfuroxan is an important step in assessing the possibility of its use as a component of high-energy compositions. As a result, a thermochemical reaction mechanism was proposed, including the opening of the furoxan ring with the formation of a rare geminal cyanonitro compound, followed by its stepwise decomposition to acetyl cyanide and then to acetic acid. It was concluded that 3-methylfuroxan was an energy-intensive molecular liquid with moderate thermal stability.

Source:

Nikita V. Muravyev, Igor N Melnikov, Daniil A. Chaplygin, Leonid L. Fershtat, Konstantin A. Monogarov Two sides of thermal stability of energetic liquid: Vaporization and decomposition of 3-methylfuroxan J. Mol. Liq., 2022, in press. DOI: 10.1016/j.molliq.2021.118059.