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Du B, Zhang W. Atmospheric oxidation chemistry of 1–methoxy 2–propyl acetate initiated by OH radicals: kinetics and mechanisms. Mol Phys 2019. [DOI: 10.1080/00268976.2019.1601786] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Benni Du
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, People’s Republic of China
| | - Weichao Zhang
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, People’s Republic of China
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2
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Blanco MB, Barnes I, Wiesen P, Teruel MA. Kinetics of the reactions of Cl atoms with CF3C(O)OCH3, CF3C(O)OCH2CH3, CF2HC(O)OCH3 in the temperature range of 287–313K and 1atm. Chem Phys Lett 2015. [DOI: 10.1016/j.cplett.2015.08.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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3
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GOUR NANDKISHOR, MISHRA BHUPESHKUMAR, SINGH HARIJI. Theoretical study on mechanism, kinetics, and thermochemistry of the gas phase reaction of 2,2,2-trifluoroethyl butyrate with OH radicals at 298 K. J CHEM SCI 2015. [DOI: 10.1007/s12039-015-0860-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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4
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Bai FY, Zhu XL, Jia ZM, Wang X, Sun YQ, Wang RS, Pan XM. Theoretical Studies of the Reactions CFxH3−xCOOR+Cl and CF3COOCH3+OH. Chemphyschem 2015; 16:1768-76. [PMID: 25872761 DOI: 10.1002/cphc.201402799] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2014] [Revised: 02/26/2015] [Indexed: 11/06/2022]
Affiliation(s)
- Feng-Yang Bai
- Faculty of Chemistry, Institute of Functional Material Chemistry, Northeast Normal University, 130024 Changchun (People's Republic of China)
| | - Xiao-Le Zhu
- Faculty of Chemistry, Institute of Functional Material Chemistry, Northeast Normal University, 130024 Changchun (People's Republic of China)
| | - Zi-Man Jia
- Faculty of Chemistry, Institute of Functional Material Chemistry, Northeast Normal University, 130024 Changchun (People's Republic of China)
| | - Xu Wang
- Faculty of Chemistry, Institute of Functional Material Chemistry, Northeast Normal University, 130024 Changchun (People's Republic of China)
| | - Yan-Qiu Sun
- Faculty of Chemistry, Institute of Functional Material Chemistry, Northeast Normal University, 130024 Changchun (People's Republic of China)
| | - Rong-Shun Wang
- Faculty of Chemistry, Institute of Functional Material Chemistry, Northeast Normal University, 130024 Changchun (People's Republic of China)
| | - Xiu-Mei Pan
- Faculty of Chemistry, Institute of Functional Material Chemistry, Northeast Normal University, 130024 Changchun (People's Republic of China).
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5
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Mishra BK. Computational study on kinetics and mechanism of Cl-initiated hydrogen abstraction of methyl fluoroacetate. J Fluor Chem 2015. [DOI: 10.1016/j.jfluchem.2015.01.014] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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6
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Kang L, Zhang C, Sun X. The mechanism and kinetic studies on oxidation reaction of acetofenate initiated by HO x, NO 3, O 3, and Cl radicals. RSC Adv 2015. [DOI: 10.1039/c5ra11453e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The chemical reaction of acetofenate (AF) in the atmosphere.
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Affiliation(s)
- Lingyan Kang
- Environment Research Institute
- Shandong University
- Jinan 250100
- P. R. China
| | - Chenxi Zhang
- Department of Resource and Environment
- Binzhou University
- Binzhou 256600
- PR China
| | - Xiaomin Sun
- Environment Research Institute
- Shandong University
- Jinan 250100
- P. R. China
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7
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Mishra BK, Singh HJ, Tiwari L. Theoretical investigation on mechanism and kinetics of the Cl-initiated hydrogen abstraction reactions of ethyl trifluoroacetate at 298 K. J Mol Model 2014; 20:2475. [PMID: 25304366 DOI: 10.1007/s00894-014-2475-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2014] [Accepted: 09/21/2014] [Indexed: 11/26/2022]
Abstract
Theoretical investigations were carried out on the gas-phase reactions of CF3C(O)OCH2CH3, ethyl trifluoroacetate (ETFA) with Cl atoms by means of modern density functional theory methods. The optimized geometries, frequencies and minimum energy path were obtained with the hybrid density functional model MPWB1K using the 6-31+G(d,p) basis set. The single point energy calculations were refined further using the G2(MP2) method. Two conformers relatively close in energy were identified for ETFA; both are likely to be important in the temperature range of our study. The existence of transition states on the corresponding potential energy surface was ascertained by performing intrinsic reaction coordinate calculations. The rate constant at 298 K calculated theoretically using canonical transition state theory was found to be in good agreement with experimentally measured values. Our calculations suggest that H abstraction from the -CH2 group is kinetically and thermodynamically more favorable than abstraction from the -CH3 group. The atmospheric lifetime of ETFA with Cl atoms was determined to be 1.98 years. To the best of our knowledge, this work represents the first determination of the rate coefficients for the gas-phase reaction of chlorine atoms in ETFA.
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Affiliation(s)
- Bhupesh Kumar Mishra
- Department of Chemical Sciences, Tezpur University, Tezpur, Napaam, Assam, 784 028, India,
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Mishra BK, Deka RC. A Theoretical Investigation on Kinetics, Mechanism, and Thermochemistry of the Gas-Phase Reactions of Methyl Fluoroacetate with OH Radicals and Fate of Alkoxy Radical. J Phys Chem A 2014; 118:8779-86. [DOI: 10.1021/jp5032042] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Bhupesh Kumar Mishra
- Department of Chemical Sciences, Tezpur University, Napaam, Tezpur, Assam-784 028, India
| | - Ramesh Chandra Deka
- Department of Chemical Sciences, Tezpur University, Napaam, Tezpur, Assam-784 028, India
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9
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Mishra BK. Theoretical investigation on the atmospheric fate of CF3C(O)OCH 2O radical: alpha-ester rearrangement vs oxidation at 298 K. J Mol Model 2014; 20:2444. [PMID: 25208556 DOI: 10.1007/s00894-014-2444-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2014] [Accepted: 08/26/2014] [Indexed: 11/25/2022]
Abstract
A theoretical study on the mechanism of the thermal decomposition of CF(3)C(O)OCH(2)O radical is presented for the first time. Geometry optimization and frequency calculations were performed at the MPWB1K/6-31 + G(d, p) level of theory and energetic information further refined by calculating the energy of the species using G2(MP2) theory. Three plausible decomposition pathways including α-ester rearrangement, reaction with O(2) and thermal decomposition (C-O bond scission) were considered in detail. Our results reveal that reaction with O(2) is the dominant path for the decomposition of CF(3)C(O)OCH(2)O radical in the atmosphere, involving the lowest energy barrier, which is in accord with experimental findings. Our theoretical results also suggest that α-ester rearrangement leading to the formation of trifluoroacetic acid TFA makes a negligible contribution to decomposition of the title alkoxy radical. The thermal rate constants for the above decomposition pathways were evaluated using canonical transition state theory (CTST) at 298 K.
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Affiliation(s)
- Bhupesh Kumar Mishra
- Department of Chemical Sciences, Tezpur University Tezpur, Tezpur, Assam, 784 028, India,
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10
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Mishra BK, Chakrabartty AK, Bhattacharjee D, Deka RC. Theoretical investigation on unimolecular decomposition of malonic acid: a potential sink for ketene. RSC Adv 2014. [DOI: 10.1039/c4ra06506a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
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11
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Theoretical study on the gas-phase reactions of ethyl butyrate with OH radicals at 298 K. MONATSHEFTE FUR CHEMIE 2014. [DOI: 10.1007/s00706-014-1255-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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12
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Mechanism and kinetics of the atmospheric degradation of perfluoropolymethylisopropyl ether by OH radical: a theoretical study. Struct Chem 2014. [DOI: 10.1007/s11224-014-0448-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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13
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Mishra BK, Lily M, Deka RC, Chandra AK. Theoretical investigation on gas-phase reaction of CF3CH2OCH3 with OH radicals and fate of alkoxy radicals (CF3CH(O•)OCH3/CF3CH2OCH2O•). J Mol Graph Model 2014; 50:90-9. [PMID: 24769690 DOI: 10.1016/j.jmgm.2014.03.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2014] [Revised: 03/25/2014] [Accepted: 03/27/2014] [Indexed: 11/15/2022]
Abstract
Detailed theoretical investigation has been performed on the mechanism, kinetics and thermochemistry of the gas phase reactions of CF3CH2OCH3 (HFE-263fb2) with OH radicals using ab-initio and DFT methods. Reaction profiles are modeled including the formation of pre-reactive and post-reactive complexes at entrance and exit channels, respectively. Our calculations reveal that hydrogen abstraction from the CH2 group is thermodynamically and kinetically more facile than that from the CH3 group. Using group-balanced isodesmic reactions, the standard enthalpies of formation for CF3CH2OCH3 and radicals (CF3CHOCH3 and CF3CH2OCH2) are also reported for the first time. The calculated bond dissociation energies for the CH bonds are in good agreement with experimental results. At 298K, the calculated total rate coefficient for CF3CH2OCH3+OH reactions is found to be in good agreement with the experimental results. The atmospheric fate of the alkoxy radicals, CF3CH(O)OCH3 and CF3CH2OCH2O are also investigated for the first time using the same level of theory. Out of three plausible decomposition channels, our results clearly point out that reaction with O2 is not the dominant path leading to the formation of CF3C(O)OCH3 for the decomposition of CF3CH(O)OCH3 radical in the atmosphere. This is in accord with the recent report of Osterstrom et al. [CPL 524 (2012) 32] but found to be in contradiction with experimental finding of Oyaro et al. [JPCA 109 (2005) 337].
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Affiliation(s)
| | - Makroni Lily
- Department of Chemistry, North-Eastern Hill University, Shillong 793022, India
| | - Ramesh Chandra Deka
- Department of Chemical Sciences, Tezpur University, Tezpur, Assam 784028, India.
| | - Asit K Chandra
- Department of Chemistry, North-Eastern Hill University, Shillong 793022, India.
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14
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A computational perspective on mechanism and kinetics of the reactions of CF3C(O)OCH2CF3 with OH radicals and Cl atoms at 298K. J Fluor Chem 2014. [DOI: 10.1016/j.jfluchem.2014.01.017] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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15
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Theoretical investigation of the atmospheric chemistry of methyl difluoroacetate: reaction with Cl atoms and fate of alkoxy radical at 298 K. Struct Chem 2014. [DOI: 10.1007/s11224-014-0425-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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16
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A theoretical investigation on the kinetics, mechanism and thermochemistry of gas-phase reactions of methyl acetate with chlorine atoms at 298 K. Chem Phys Lett 2014. [DOI: 10.1016/j.cplett.2014.01.049] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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18
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Mishra BK. Theoretical investigation on the atmospheric fate of the CF3C(O)OCH(O)CF3 radical: alpha-ester rearrangement vs. oxidation. RSC Adv 2014. [DOI: 10.1039/c4ra00881b] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
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19
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Mishra BK, Chakrabartty AK, Deka RC. A computational perspective on the kinetics and thermochemistry of the gas phase reactions of 1, 1-dichlorodimethylether (DCDME) with OH radical at 298 K. Mol Phys 2013. [DOI: 10.1080/00268976.2013.842008] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
| | | | - Ramesh Chandra Deka
- Department of Chemical Sciences, Tezpur University, Tezpur Napaam, Assam, India
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20
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Theoretical study on the kinetics and branching ratios of the gas phase reactions of 4,4,4-trifluorobutanal (TFB) with OH radical in the temperature range of 250–400K and atmospheric pressure. J Fluor Chem 2013. [DOI: 10.1016/j.jfluchem.2013.06.015] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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21
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A theoretical investigation on the kinetics and reactivity of the gas-phase reactions of ethyl chlorodifluoroacetate with OH radical and Cl atom at 298 K. Struct Chem 2013. [DOI: 10.1007/s11224-013-0312-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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