Kinetics of thermal decomposition of methyl derivatives of 7H-difurazanofuxanoazepine and 7H-tryfurasanoazepine

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Abstract

The thermal stability of N-methyl derivatives of 7H-difurasanofuroxanoazepine and 7H-trifurazanoazepine in non-isothermal and isothermal modes has been studied. Formal-kinetic regularities of decomposition and temperature dependences of reaction rate constants have been determined. The thermal stability methyl, propargyl, cyanomethyl, allyl and amine derivatives of azepines is compared.

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About the authors

A. I. Kazakov

Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences

Author for correspondence.
Email: akazakov@icp.ac.ru
Russian Federation, Chernogolovka

D. B. Lempert

Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences

Email: akazakov@icp.ac.ru
Russian Federation, Chernogolovka

A. V. Nabatova

Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences

Email: akazakov@icp.ac.ru
Russian Federation, Chernogolovka

E. L. Ignatieva

Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences

Email: akazakov@icp.ac.ru
Russian Federation, Chernogolovka

D. V. Dashko

“Tekhnolog” Special Design and Technological Bureau

Email: akazakov@icp.ac.ru
Russian Federation, St. Petersburg

V. V. Raznoschikov

Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences

Email: akazakov@icp.ac.ru
Russian Federation, Chernogolovka

L. S. Yanovskiy

Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences; Moscow Energetic Institute

Email: akazakov@icp.ac.ru
Russian Federation, Chernogolovka; Moscow

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2. Fig. 1. Structures of N-substituted derivatives of 7H-difurazanofuroxanoazepine and 7H-trifurazanoazepine.

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3. Fig. 2. TG (1) and DSC (2) curves for thermal decomposition of AzCH3. Sample weight ~2 mg, heating rate 5 K/min, argon purge rate 40 ml/min.

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4. Fig. 3. Kinetic dependences of the amount of heat Qt released during thermal decomposition of the compound AzCH3 on time t, at different temperatures: 1 – 235.4, 2 – 251.2, 3 – 261.7, 4 – 270.4, 5 – 281.2, 6 – 288.4 °C. Points – experiment, solid curves – calculation according to equation (1).

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5. Fig. 4. TG (1) and DSC (2) curves for thermal decomposition of Az(O)CH3. Sample weight ~2 mg, heating rate 5 K/min, argon purge rate 40 ml/min.

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6. Fig. 5. Dependence of the reaction rate of thermal decomposition of Az(O)CH3 on the depth of decomposition at different temperatures: 1 – 220.2, 2 – 231.4, 3 – 234.8, 4 – 240.2, 5 – 245.2 °C.

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7. Fig. 6. Kinetic curves of the dependence of the depth of decomposition of Az(O)CH3 on time at different temperatures: 1 – 245.2, 2 – 240.2, 3 – 234.8, 4 – 231.4, 5 – 215.2 °C. Points – experiment, solid curves – calculation according to equation (2).

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