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Baidya B, Lily M, Chandra AK. Theoretical studies on atmospheric chemistry of CHF 2 CF 2 CH 2 OH: Reaction with OH radicals, lifetime and global warming potentials. COMPUT THEOR CHEM 2017. [DOI: 10.1016/j.comptc.2017.09.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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2
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Kawade MN, Srinivas D, Upadhyaya HP. Kinetics of gas phase OH radical reaction with thiophene in the 272–353 K temperature range: A laser induced fluorescence study. Chem Phys Lett 2017. [DOI: 10.1016/j.cplett.2017.05.072] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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3
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Lily M, Baidya B, Chandra AK. Theoretical studies on atmospheric chemistry of HFE-245mc and perfluoro-ethyl formate: Reaction with OH radicals, atmospheric fate of alkoxy radical and global warming potential. Chem Phys Lett 2017. [DOI: 10.1016/j.cplett.2016.12.037] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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4
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Allison TC. Application of an Artificial Neural Network to the Prediction of OH Radical Reaction Rate Constants for Evaluating Global Warming Potential. J Phys Chem B 2015; 120:1854-63. [PMID: 26684219 DOI: 10.1021/acs.jpcb.5b09558] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Rate constants for reactions of chemical compounds with hydroxyl radical are a key quantity used in evaluating the global warming potential of a substance. Experimental determination of these rate constants is essential, but it can also be difficult and time-consuming to produce. High-level quantum chemistry predictions of the rate constant can suffer from the same issues. Therefore, it is valuable to devise estimation schemes that can give reasonable results on a variety of chemical compounds. In this article, the construction and training of an artificial neural network (ANN) for the prediction of rate constants at 298 K for reactions of hydroxyl radical with a diverse set of molecules is described. Input to the ANN consists of counts of the chemical bonds and bends present in the target molecule. The ANN is trained using 792 (•)OH reaction rate constants taken from the NIST Chemical Kinetics Database. The mean unsigned percent error (MUPE) for the training set is 12%, and the MUPE of the testing set is 51%. It is shown that the present methodology yields rate constants of reasonable accuracy for a diverse set of inputs. The results are compared to high-quality literature values and to another estimation scheme. This ANN methodology is expected to be of use in a wide range of applications for which (•)OH reaction rate constants are required. The model uses only information that can be gathered from a 2D representation of the molecule, making the present approach particularly appealing, especially for screening applications.
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Affiliation(s)
- Thomas C Allison
- Chemical Informatics Research Group, Material Measurement Laboratory, National Institute of Standards and Technology , 100 Bureau Drive, Stop 8320, Gaithersburg, Maryland 20899-8320, United States
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Bhattacharjee D, Mishra BK, Deka RC. Theoretical insight on atmospheric chemistry of HFE-365mcf3: reactions with OH radicals, atmospheric lifetime, and fate of alkoxy radicals (CF3CF2CH(O•)OCH3/CF3CF2CH2OCH2O•). J Mol Model 2015; 21:69. [DOI: 10.1007/s00894-015-2629-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2014] [Accepted: 02/15/2015] [Indexed: 11/28/2022]
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6
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Lily M, Chandra AK. Theoretical investigation on kinetics and thermochemistry of reaction of CHF 2CF 2OCH 2CF 3with OH radicals and global warming potentials. Mol Phys 2015. [DOI: 10.1080/00268976.2014.955541] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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7
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Mishra BK, Lily M, Chandra AK, Deka RC. Theoretical studies on atmospheric chemistry of HFE-347mcc3: reactions with OH radicals and Cl atoms. J PHYS ORG CHEM 2014. [DOI: 10.1002/poc.3340] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
| | - Makroni Lily
- Department of Chemistry; North - Eastern Hill University; Shillong 793 022 India
| | - Asit K. Chandra
- Department of Chemistry; North - Eastern Hill University; Shillong 793 022 India
| | - Ramesh Chandra Deka
- Department of Chemical Sciences; Tezpur University Tezpur; Assam 784 028 India
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Zhu P, Ai LL, Wang H, Liu JY. Theoretical studies on mechanism and kinetics of the hydrogen-abstraction reaction of CF2HCOOCH3 with OH radicals. COMPUT THEOR CHEM 2014. [DOI: 10.1016/j.comptc.2013.12.019] [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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10
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Lily M, Sutradhar D, Chandra AK. Theoretical investigations on kinetics, mechanism and thermochemistry of the gas phase reactions of CHF2OCF2CHF2 with OH radicals. COMPUT THEOR CHEM 2013. [DOI: 10.1016/j.comptc.2013.08.016] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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11
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Poutsma ML. Evolution of Structure–Reactivity Correlations for the Hydrogen Abstraction Reaction by Hydroxyl Radical and Comparison with That by Chlorine Atom. J Phys Chem A 2013; 117:6433-49. [DOI: 10.1021/jp404749z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Marvin L. Poutsma
- Chemical Sciences Division, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee
37831-6197, United States
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Wang L, Zhao J, He H, Zhang J. Theoretical studies on the reactions of CHF2CF2OCH3/CH2FCF2OCH3 with OH radicals. J Fluor Chem 2013. [DOI: 10.1016/j.jfluchem.2013.02.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Jogeshwari Devi K, Chandra AK. Theoretical Investigation of the gas-phase reactions of (CF3)2CHOCH3 with OH Radical. Chem Phys Lett 2011. [DOI: 10.1016/j.cplett.2010.12.011] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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14
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Argyrakis W, Köppl C, Werner HJ, Frey W, Baro A, Laschat S. A combined quantum mechanical and experimental approach towards chiral diketopiperazine hydroperoxides. J PHYS ORG CHEM 2010. [DOI: 10.1002/poc.1809] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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15
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Zhou CW, Simmie JM, Curran HJ. An ab initio/Rice-Ramsperger-Kassel-Marcus study of the hydrogen-abstraction reactions of methyl ethers, H3COCH3−x(CH3)x, x = 0–2, by ˙OH; mechanism and kinetics. Phys Chem Chem Phys 2010; 12:7221-33. [DOI: 10.1039/c002911d] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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16
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Theoretical studies on the kinetics and reactivity of the gas-phase addition and H-abstraction reactions of methylpyridine with atomic chlorine. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.theochem.2009.06.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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17
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Chen L, Uchimaru T, Mizukado J, Kutsuna S, Tokuhashi K, Sekiya A. Kinetics of the gas-phase reactions of cyclo-CF2CFXCHXCHX - (X = H, F, Cl) with OH radicals at 253-328 K. INT J CHEM KINET 2009. [DOI: 10.1002/kin.20431] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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18
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Parveen S, Chandra AK. Theoretical Studies on Kinetics and Reactivity of the Gas-Phase Addition and H-Abstraction Reactions of Pyridine with Atomic Chlorine. J Phys Chem A 2008; 113:177-83. [DOI: 10.1021/jp805356z] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Salma Parveen
- Department of Chemistry, North-Eastern Hill University, Shillong 793022, India
| | - Asit K. Chandra
- Department of Chemistry, North-Eastern Hill University, Shillong 793022, India
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Cam Nam P, Nguyen MT, Zeegers-Huyskens T. Effects of fluorine-substitution on the molecular properties of dimethyl ethers: A theoretical investigation. ACTA ACUST UNITED AC 2007. [DOI: 10.1016/j.theochem.2007.06.023] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Yang L, Liu JY, Wang L, He HQ, Wang Y, Li ZS. Theoretical study of the reactions CF3CH2OCHF2+ OH/Cl and its product radicals and parent ether(CH3CH2OCH3) with OH. J Comput Chem 2007; 29:550-61. [PMID: 17705163 DOI: 10.1002/jcc.20813] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
A dual-level direct dynamic method is employed to study the reaction mechanisms of CF3CH2OCHF2 (HFE-245fa2; HFE-245mf) with the OH radicals and Cl atoms. Two hydrogen abstraction channels and two displacement processes are found for each reaction. For further study, the reaction mechanisms of its products (CF3CH2OCF2 and CF3CHOCHF2) and parent ether CH3CH2OCH3 with OH radical are investigated theoretically. The geometries and frequencies of all the stationary points and the minimum energy paths (MEPs) are calculated at the B3LYP/6-311G(d,p) level. The energetic information along the MEPs is further refined at the G3(MP2) level of theory. For reactions CF3CH2OCHF2 + OH/Cl, the calculation indicates that the hydrogen abstraction from --CH2-- group is the dominant reaction channel, and the displacement processes may be negligible because of the high barriers. The standard enthalpies of formation for the reactant CF3CH2OCHF2, and two products CF3CH2OCHF2 and CF3CHOCHF2 are evaluated via group-balanced isodesmic reactions. The rate constants of reactions CF3CH2OCHF2 + OH/Cl and CH3CH2OCH3 + OH are estimated by using the variational transition state theory over a wide range of temperature (200-2000 K). The agreement between the theoretical and experimental rate constants is good in the measured temperature range. From the comparison between the rate constants of the reactions CF3CH2OCHF2 and CH3CH2OCH3 with OH, it is shown that the fluorine substitution decreases the reactivity of the C--H bond.
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Affiliation(s)
- Lei Yang
- State Key Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun 130023, People's Republic of China
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Yang L, He HQ, Ji YM, Liu JY, Li ZS. Direct ab initio dynamics calculations of the rate constants for the reaction of CHF2CF2OCH3 with Cl. INT J CHEM KINET 2007. [DOI: 10.1002/kin.20230] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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22
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Quantum chemical study of hydrogen abstraction reactions of the ethynyl radical with hydrogen compounds (C2H+HX). ACTA ACUST UNITED AC 2005. [DOI: 10.1016/j.theochem.2005.07.023] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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23
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Papadimitriou VC, Kambanis KG, Lazarou YG, Papagiannakopoulos P. Kinetic Study for the Reactions of Several Hydrofluoroethers with Chlorine Atoms. J Phys Chem A 2004. [DOI: 10.1021/jp031081z] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | | | - Yannis G. Lazarou
- Department of Chemistry, University of Crete, Heraklion 71409, Crete, Greece
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Liu JY, Li ZS, Wu JY, Wei ZG, Zhang G, Sun CC. Theoretical study and rate constant calculation of the CH2O+CH3 reaction. J Chem Phys 2003. [DOI: 10.1063/1.1605938] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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25
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Wu JY, Liu JY, Li ZS, Sun CC. Dual-level direct dynamics studies for the reactions of CH3OCH3 and CF3OCH3 with the OH radical. J Chem Phys 2003. [DOI: 10.1063/1.1575197] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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26
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Özen AS, Aviyente V, Klein RA. Modeling the Oxidative Degradation of Azo Dyes: A Density Functional Theory Study. J Phys Chem A 2003. [DOI: 10.1021/jp026287z] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Alimet S. Özen
- Department of Chemistry, Bogazici University, 80815 Bebek-Istanbul, Turkey
| | - Viktorya Aviyente
- Department of Chemistry, Bogazici University, 80815 Bebek-Istanbul, Turkey
| | - Roger A. Klein
- Institute for Physiological Chemistry, University of Bonn, D-53115 Bonn, Federal Republic of Germany
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Wu JY, Liu JY, Li ZS, Huang XR, Sun CC. Dual-level direct dynamics studies for the reactions of dimethyl ether with hydrogen atom and methyl radical. J Comput Chem 2003; 24:593-600. [PMID: 12632473 DOI: 10.1002/jcc.10219] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The dual-level direct dynamics approach is employed to study the dynamics of the CH(3)OCH(3) + H (R1) and CH(3)OCH(3) + CH(3) (R2) reactions. Low-level calculations of the potential energy surface are carried out at the MP2/6-311+G(d,p) level of theory. High-level energetic information is obtained at the QCISD(T) level of theory with the 6-311+G(3df,3pd) basis set. The dynamics calculations are performed using variational transition state theory (VTST) with the interpolated single-point energies (ISPE) method, and small-curvature tunneling (SCT) is included. It is shown that the reaction of CH(3)OCH(3) with H (R1) may proceed much easier and with a lower barrier height than the reaction with CH(3) radical (R2). The calculated rate constants and activation energies are in good agreement with the experimental values. The calculated rate constants are fitted to k(R1) = 1.16 x 10(-19) T(3) exp(-1922/T) and k(R2) = 1.66 x 10(-28) T(5) exp(-3086/T) cm(3) mol(-1) s(-1) over a temperature range 207-2100 K. Furthermore, a small variational effect and large tunneling effect in the lower temperature range are found for the two reactions.
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Affiliation(s)
- Jia-Yan Wu
- Institute of Theoretical Chemistry, State Key Laboratory of Theoretical and Computational Chemistry, Jilin University, Changchun 130023, People's Republic of China
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28
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Rate constants estimation for the reaction of hydrofluorocarbons and hydrofluoroethers with OH radicals. Chem Phys Lett 2003. [DOI: 10.1016/s0009-2614(02)01718-9] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Chandra AK, Uchimaru T, Urata S, Sugie M, Sekiya A. Estimation of rate constants for hydrogen atom abstraction by OH radicals using the C?H bond dissociation enthalpies: Haloalkanes and haloethers. INT J CHEM KINET 2002. [DOI: 10.1002/kin.10110] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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30
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Urata S, Takada A, Uchimaru T, Chandra AK, Sekiya A. Artificial neural network study for the estimation of the C–H bond dissociation enthalpies. J Fluor Chem 2002. [DOI: 10.1016/s0022-1139(02)00128-8] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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31
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Urata S, Uchimaru T, Chandra AK, Takada A, Sekiya A. C?H bond dissociation enthalpies of fluorinated formates and estimation of their rate constants for the reactions with OH radicals: A DFT study. INT J CHEM KINET 2002. [DOI: 10.1002/kin.10070] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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32
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Fokin AA, Schreiner PR. Selective alkane transformations via radicals and radical cations: insights into the activation step from experiment and theory. Chem Rev 2002; 102:1551-94. [PMID: 11996544 DOI: 10.1021/cr000453m] [Citation(s) in RCA: 306] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Andrey A Fokin
- Department of Organic Chemistry, Kiev Polytechnic Institute, 37 Pobedy Avenue, 03056 Kiev, Ukraine.
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Goto M, Kawasaki M, Wallington TJ, Hurley MD, Sharratt AP. Atmospheric chemistry of CH2FOCH2F: Reaction with Cl atoms and atmospheric fate of CH2FOCHFO· radicals. INT J CHEM KINET 2002. [DOI: 10.1002/kin.10038] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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The C-H Bond Dissociation Enthalpies and Estimation of the Kinetics of Hydrogen Abstraction by OH radical for Fluorinated Formates: A DFT Study. JOURNAL OF COMPUTER AIDED CHEMISTRY 2001. [DOI: 10.2751/jcac.2.45] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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