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Rudakov GF, Kalinichenko AI, Nguyen TQ, Zinchenko SS, Cherkaev GV, Fedyanin IV, Sinditskii VP. Monosubstituted Polynitroalkoxy‐1,2,4,5‐Tetrazines: A New Family of Melt‐Castable Energetic Materials. PROPELLANTS EXPLOSIVES PYROTECHNICS 2022. [DOI: 10.1002/prep.202100262] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Gennady F. Rudakov
- Chemical Engineering Department Mendeleev University of Chemical Technology 9 Miusskaya Sq. Moscow Russia
| | - Alexandra I. Kalinichenko
- Chemical Engineering Department Mendeleev University of Chemical Technology 9 Miusskaya Sq. Moscow Russia
| | - Tu Q. Nguyen
- Chemical Engineering Department Mendeleev University of Chemical Technology 9 Miusskaya Sq. Moscow Russia
| | - Svetlana S. Zinchenko
- Chemical Engineering Department Mendeleev University of Chemical Technology 9 Miusskaya Sq. Moscow Russia
| | - Georgij V. Cherkaev
- Enikolopov Institute of Synthetic Polymeric Materials Russian Academy of Sciences 70 Profsoyuznaya St. 117393 Moscow Russia
| | - Ivan V. Fedyanin
- A. N. Nesmeyanov Institute of Organoelement Compounds Russian Academy of Sciences Vavilova st., 28. 119991 Moscow Russia
| | - Valery P. Sinditskii
- Chemical Engineering Department Mendeleev University of Chemical Technology 9 Miusskaya Sq. Moscow Russia
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Junying WU, Yanxi H, Lijun Y, Deshen G, Fuping W, Heqi W, Lang C. Reactive Molecular Dynamics Simulations of the Thermal Decomposition Mechanism of 1,3,3-Trinitroazetidine. Chemphyschem 2018; 19:2683-2695. [PMID: 30033624 DOI: 10.1002/cphc.201800550] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2018] [Indexed: 11/05/2022]
Abstract
1,3,3-Trinitroazetidine (TNAZ) has a molecular formula of C3 H4 N4 O6 and the characteristics of low melting point, low impact sensitivity and good thermal stability. It is suitable for melt casting and pressed charges, and it has broad prospects for applications in low-sensitivity ammunition. In this study, the thermal decomposition of TNAZ crystals at high temperature was calculated by molecular dynamics simulation with the ReaxFF/lg reactive force field. The change in the potential energy of TNAZ, the formation of small-molecule products and clusters, and the initial reaction path of TNAZ were analysed. The kinetic parameters of different reaction stages in TNAZ thermal decomposition were obtained. The primary thermal decomposition reaction of TNAZ was found to be as follows: N-NO2 and C-NO2 bonds broke; a H atom on the quaternary ring was transferred to the nitro group; and the C-HNO2 and N-HNO2 bonds broke. The main decomposition products of TNAZ were thus NO2 , NO, N2 , H2 O, CO2 and HNO2 , as well as macromolecular clusters. The size of the cluster structure was related to the reaction temperature, and the higher the temperature was, the smaller the cluster size was.
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Affiliation(s)
- W U Junying
- State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing, China, 100081
| | - Huang Yanxi
- State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing, China, 100081
| | - Yang Lijun
- State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing, China, 100081
| | - Geng Deshen
- State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing, China, 100081
| | - Wang Fuping
- State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing, China, 100081
| | - Wang Heqi
- State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing, China, 100081
| | - Chen Lang
- State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing, China, 100081
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Veals JD, Thompson DL. Thermal decomposition of 1,3,3-trinitroazetidine (TNAZ): A density functional theory andab initiostudy. J Chem Phys 2014. [DOI: 10.1063/1.4870652] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Tan B, Long X, Li J, Nie F, Huang J. Insight into shock-induced chemical reaction from the perspective of ring strain and rotation of chemical bonds. J Mol Model 2012; 18:5127-32. [PMID: 22777429 DOI: 10.1007/s00894-012-1516-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2012] [Accepted: 06/21/2012] [Indexed: 10/28/2022]
Abstract
Density functional theory BLYP/DNP and hyperhomodesmotic equations were employed to calculate ring strain energy, the bond dissociation energy of X-NO(2) (X=C, N) and the charges on the nitro groups of several four-membered and six-membered heterocycle compounds. BLYP/DNP and LST/QST + CG method were also applied to calculate bond rotational energy of X-NO(2) (X=C, N) of above mentioned compounds. It indicated that ring strain energy of four-membered heterocycle nitro compounds is apparently higher than that of six-membered heterocycle nitro compounds. Predictably, ring-opening reactions may preferentially occur for those compounds containing higher ring strain energy under shock. In addition, C-NO(2) bonds in these compounds may rotate easier than N-NO(2) bonds in response to the external shock. As for N-NO(2) bonds in these compounds, they also respond to the external shock by the rotation of N-NO(2) bonds, once to the saddle point of the rotational energy barrier, the whole molecule will become relaxed, N-NO(2) bond becomes weaker and eventually leads to the breakage. When one -C=O, -C=NH or -NH(2) group is introduced to the six-membered heterocycle, the charges on the nitro groups of the new compound decrease drastically, and ring strains increase remarkably. It can be predicted that the new compounds will be more sensitive to shock, and the viewpoint is confirmed by the experimental results of shock sensitivity (small scale gap test) of several explosives.
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Affiliation(s)
- Bisheng Tan
- Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang 621900, People's Republic of China.
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Oftadeh M, Khozani MH, Radhoosh M, Keshavarz MH. DFT molecular orbital calculations of initial step in decomposition pathways of TNAZ and some of its derivatives with –F, –CN and –OCH3 groups. COMPUT THEOR CHEM 2011. [DOI: 10.1016/j.comptc.2011.01.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Sinditskii V, Egorshev V, Berezin M, Rudakov G, Ladonin A, Katorov D. Combustion Behaviour of Melt-Castable Explosives from Azetidine Family. PROPELLANTS EXPLOSIVES PYROTECHNICS 2008. [DOI: 10.1002/prep.200700237] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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A direct ab initio dynamics study of the initial decomposition steps of gas phase 1,3,3-trinitroazetidine. Chem Phys Lett 2005. [DOI: 10.1016/j.cplett.2005.07.014] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Velardez GF, Alavi S, Thompson DL. Theoretical predictions of the initial decomposition steps of dimethylnitramine. J Chem Phys 2005; 123:074313. [PMID: 16229576 DOI: 10.1063/1.1990121] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The structures and energies of the reactants, products, and transition states of the initial steps in the gas-phase decomposition of dimethylnitramine (DMNA) have been determined by quantum chemical calculations at the B3LYP density-functional theory, MP2, and G2 levels. The pathways considered are NO2 elimination, HONO elimination, and nitro-nitrite rearrangement. The NO2 elimination is predicted to be the main channel of the gas-phase decomposition of DMNA in accord with experiment. The values of the Arrhenius parameters, log A=16.6+/-0.5 and Ea=40.0+/-0.6 kcal/mol, for the N-NO2 bond-fission reaction were obtained using a canonical variational theory with B3LYP energies and frequencies. The HONO-elimination channel has the next lowest activation energy of 44.7+/-0.5 kcal/mol (log A=13.6+/-0.5) and is characterized by a five-member transition-state configuration in which a hydrogen atom from one of the methyl groups is transferred to an oxygen atom of NO2. Tunneling contributions to the rate of this reaction have been estimated. The nitro-nitrite rearrangement reaction occurs via a transition state in which both oxygen atoms of NO2 are loosely bound to the central nitrogen atom, for which Rice-Ramsperger-Kassel-Marcus theory predicts log A=14.4+/-0.6 and Ea=54.1+/-0.8 kcal/mol.
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Affiliation(s)
- Gustavo F Velardez
- Department of Chemistry, University of Missouri-Columbia, Columbia, Missouri 65211, USA
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Alavi S, Reilly LM, Thompson DL. Theoretical predictions of the decomposition mechanism of 1,3,3-trinitroazetidine (TNAZ). J Chem Phys 2003. [DOI: 10.1063/1.1611471] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Long GT, Wight CA. Thermal Decomposition of a Melt-Castable High Explosive: Isoconversional Analysis of TNAZ. J Phys Chem B 2002. [DOI: 10.1021/jp012859o] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Gregory T. Long
- Center for Thermal Analysis, Department of Chemistry, University of Utah, Salt Lake City, Utah 84112
| | - Charles A. Wight
- Center for Thermal Analysis, Department of Chemistry, University of Utah, Salt Lake City, Utah 84112
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Wilcox C, Zhang YX, Bauer S. The thermochemistry of TNAZ (1,3,3-trinitroazetidine) and related species: G3(MP2)//B3LYP heats of formation. ACTA ACUST UNITED AC 2001. [DOI: 10.1016/s0166-1280(00)00646-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Zhang YX, Wilcox C, Bauer S. The Gas-Phase Pyrolysis of Nitrocyclobutanes: a Shock-Tube Investigation Supplemented with DFT Calculations of their Thermochemical and Structural Parameters. Z PHYS CHEM 2001. [DOI: 10.1524/zpch.2001.215.9.1165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Mono- and 1,1-dinitrocyclobutanes (highly diluted in Ar) were pyrolyzed at temperatures 860–1300 K in reflected shocks. Activation energies for their initial fragmentations were derived from measurements of relative rates of species loss, compared to cyclobutyl chloride and isopropyl bromide:
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Wilcox C, Zhang YX, Bauer S. The thermochemistry of TNAZ (1,3,3-trinitroazetidine) and related species: models for calculating heats of formation. ACTA ACUST UNITED AC 2000. [DOI: 10.1016/s0166-1280(99)00475-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Zhang YX, Bauer SH. Gas-Phase Pyrolyses of 2-Nitropropane and 2-Nitropropanol: Shock-Tube Kinetics. J Phys Chem A 2000. [DOI: 10.1021/jp993204e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yi-Xue Zhang
- Department of Chemistry and Chemical Biology, Baker Chemical Laboratory, Cornell University, Ithaca, New York 14853
| | - S. H. Bauer
- Department of Chemistry and Chemical Biology, Baker Chemical Laboratory, Cornell University, Ithaca, New York 14853
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Zhang YX, Bauer SH. The Gas-Phase Pyrolysis of 2,2-Dinitropropane: Shock-Tube Kinetics. J Phys Chem A 2000. [DOI: 10.1021/jp9932057] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yi-Xue Zhang
- Department of Chemistry and Chemical Biology, Baker Chemical Laboratory, Cornell University, Ithaca, New York 14853
| | - S. H. Bauer
- Department of Chemistry and Chemical Biology, Baker Chemical Laboratory, Cornell University, Ithaca, New York 14853
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