Реферат: The thermal decomposition of trinitropyrazole (I) and its ammonium salt proceeds with a very strong self-acceleration, caused mainly by the catalytic action of the condensed products. The first-order rate constant for the initial stage k 1 describes the decomposition to a depth of conversion of 0.5% and is characterized by the following kinetic parameters E (kJ/mol) and log(A, s−1): 131.8 and 9.60 for the liquid phase and 116.0 and 8.57 for the solid state. The rate constant k 1 is smaller if the reaction occurs in nonpolar solvents and if I is methylated at position 1. All these data are interpreted in the framework of a mechanism according to which the reaction involves the oxidation by a nitro group of a neighboring carbon atom and proceeds through a highly polar cyclic transition state. Evaluation of the thermal stability of I is conducted using the method of a reference series composed of well-known regular HEs, which for the first time was implemented in terms of k 1. In the temperature range 20–80°C, the stability of trinitropyrazole is close to that of nitroglycerin. Trinitropyrazole ammonium salt is severalfold more stable than trinitropyrazole itself.

Библиографическая ссылка: Dubikhin V.V. , Nazin G.M. , Prokudin V.G. , Aliev Z.G. , Dalinger I.L. , Shevelev S.A.
Thermal stability of 3,4,5-trinitropyrazole and its ammonium salt
Russian Journal of Physical Chemistry B. 2015. V.9. N2. P.211-217. DOI: 10.1134/s1990793115020037 WOS Scopus OpenAlex

Идентификаторы БД:

≡ Web of science:	WOS:000354390900007
≡ Scopus:	2-s2.0-84929175169
≡ OpenAlex:	W611201974

Альметрики: