On the mechanism of the high-temperature decomposition of azomethane in shock waves

Кузнецов, Н. М.; Karasevich, Yu. K.; Petrov, Yu. P.; Turetskii, S. V.

doi:10.1134/s1990793109030270

Cited by 2 publications

(2 citation statements)

References 6 publications

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“…53 No. 1 2012 radicals with extremely long C-N and C-O bonds (to 3.396 and 3.654 Å, respectively, which are close to published values [43]).…”

Section: (Vi)mentioning

confidence: 96%

“…Therefore, a so called concerted mechanism of decomposition, when two kinetically indivisible processes (as, for example, in the thermal decomposition of azomethane [52][53][54][55]) occur at a single step of the reaction, does not occur in the dissociation of nitromethane. The high temperature disintegration of the nitromethane molecule consists in the elimination of radicals from it as a result of the C-N bond rupture, and this process is a classical unimolecular reaction, which took place in our experiments in a transition region in terms of pressure with the clearly pronounced dependence of the rate constants of disin tegration on pressure.…”

Section: (5)mentioning

confidence: 99%

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Kinetics of $$\dot NO_2$$ formation upon the decomposition of nitromethane behind shock waves and the possibility of nitromethane isomerization in the course of the reaction

2012

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The decomposition of nitromethane behind shock waves was studied at T = 1190-1490 K and P ≈ 1.5 atm; the reaction was monitored based on the formation and consumption of radicals, which were detected by their absorption in the region of λ = 405 nm. It was found that the curves of the yield of have a convex shape, which is characteristic of the formation of primary decomposition products. Based on an analysis of the initial sections of the experimental curves of the yield of , the temperature dependence of the rate constants of formation of these radicals upon the decomposition of nitromethane was found for the first time: k 1 ( ) = (6.3 ± 2) × 10 12 exp(-48.9 ± 2/RT) s -1 (the dimensionality of E a is kcal/mol). It was found that the rate constants of nitromethane decomposition measured from the consumption of the parent substance and the yield of radicals almost coincide with each other. A kinetic simulation of the forma tion and consumption of upon the decomposition of nitromethane was performed. A good agreement between experimental and calculated data was achieved. A brief theoretical analysis of competition between the channels of direct disintegration and isomerization under conditions of the thermal decomposition of nitromethane was performed. The advantage of the direct disintegration channel with the rupture of the C-N bond was shown. Both experimental and published data on the isomerization of nitromethane into methyl nitrite upon its thermal decomposition and photolysis were analyzed.

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“…53 No. 1 2012 radicals with extremely long C-N and C-O bonds (to 3.396 and 3.654 Å, respectively, which are close to published values [43]).…”

Section: (Vi)mentioning

confidence: 96%

Section: (5)mentioning

confidence: 99%

Kinetics of $$\dot NO_2$$ formation upon the decomposition of nitromethane behind shock waves and the possibility of nitromethane isomerization in the course of the reaction

2012

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Macrocyclic tetra(azo-) and tetra(azoxyfurazan)s: Comparative study of decomposition and combustion with linear analogs

Sinditskii

Burzhava

Шереметев

2021

Energetic Materials Frontiers

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On the mechanism of the high-temperature decomposition of azomethane in shock waves

Cited by 2 publications

References 6 publications

Kinetics of $$\dot NO_2$$ formation upon the decomposition of nitromethane behind shock waves and the possibility of nitromethane isomerization in the course of the reaction

Kinetics of $$\dot NO_2$$ formation upon the decomposition of nitromethane behind shock waves and the possibility of nitromethane isomerization in the course of the reaction

Macrocyclic tetra(azo-) and tetra(azoxyfurazan)s: Comparative study of decomposition and combustion with linear analogs

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