1
|
Zhong W, Zhao M, Zhao J, Wang F, Gao Z, Bian H. Exploring the kinetics and mechanism of C2F5C(O)CF(CF3)2 reaction with hydrogen radical. Chem Phys Lett 2022. [DOI: 10.1016/j.cplett.2022.140130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
2
|
Porto CM, Santana LC, Morgon NH. Theoretical investigation of the cooperative effect of solvent: a case study. Phys Chem Chem Phys 2022; 24:14603-14615. [DOI: 10.1039/d1cp05388d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The effect of solvent was investigated at the DFT level, M06-2X/6-31++G(d,p), for the implicit, namely the universal solvent model based on solute electron density (SMD), and hybrid solvation models, and...
Collapse
|
3
|
Chow R, Mok DKW. A theoretical study of the addition of CH 2OO to hydroxymethyl hydroperoxide and its implications on SO 3 formation in the atmosphere. Phys Chem Chem Phys 2020; 22:14130-14141. [PMID: 32542295 DOI: 10.1039/d0cp00961j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reaction of hydroxymethyl hydroperoxide (HMHP, HOCH2OOH) with the simplest Criegee intermediate, CH2OO, has been examined using quantum chemical methods with transition state theory. Geometry optimization and IRC calculations were performed using the M06-2X, MN15-L, and B2PLYP-D3 functionals in conjunction with the aug-cc-pVTZ basis set. Single point energy calculations using QCISD(T) and BD(T) with the same basis set have been performed to determine the energy of reactants, reactive complexes, transition states, and products. Rate coefficients have been obtained using variational transition state theory. The addition of CH2OO on the three different oxygen atoms in HMHP has been considered and the ether oxide forming channel, CH2OO + HOCH2OOH → HOCH2O(O)CH2OOH (channel 2), is the most favorable. The best computed standard enthalpy of reaction (ΔH) and zero-point corrected barrier height are -20.02 and -6.33 kcal mol-1, respectively. The reaction barrier is negative and our results suggest that both the inner and outer transition states contribute to the corresponding overall reactive flux in the tropospheric temperature range (220 K to 320 K). A two-transition state model has been used to obtain reliable rate coefficients at the high-pressure limit. The pressure-dependent rate coefficient calculations using the SS-QRRK theory have shown that this channel is pressure-dependent. Moreover, our investigation has shown that the ether oxide formed may rapidly react with SO2 at 298 K to form SO3, which can, in turn, react with water to form atmospheric H2SO4. A similar calculation has been conducted for the reaction of HMHP with OH, suggesting that the titled reaction may be a significant sink of HMHP. Therefore, the reaction between CH2OO and HOCH2OOH could be an indirect source for generating atmospheric H2SO4, which is crucial to the formation of clouds, and it might relieve global warming.
Collapse
Affiliation(s)
- Ronald Chow
- Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hung Hom, Hong Kong.
| | | |
Collapse
|
4
|
Sun J, Chu H, Wu W, Chen F, Sun Y, Liu J, Shao Y, Tang Y. A theoretical study on gas-phase reactions of acrylic acid with chlorine atoms: mechanism, kinetics, and insights. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:15772-15784. [PMID: 32088822 DOI: 10.1007/s11356-020-08100-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Accepted: 02/12/2020] [Indexed: 06/10/2023]
Abstract
Chlorine atoms initiated oxidation reactions are significant for the removal of typical volatile organic compounds (VOCs) in the atmosphere. The intrinsic mechanisms of CH2=CHCOOH + Cl reaction have been carried out at the CCSD(T)/cc-pVTZ//M06-2X/6-311++G(d,p) level. There are hydrogen abstraction and C-addition pathways on potential energy surfaces. By analyses, the addition intermediates of IM1(ClCH2CHCOOH) and IM2(CH2CHClCOOH) are found to be dominant. The secondary reactions of IM1 and IM2 have been discussed in the presence of O3, O2, NO, and NO2. And we have also investigated the degradation mechanisms of ClCH2CHO2COOH with NO, NO2, and self-reaction. Moreover, the atmospheric kinetics has been calculated by the variable reaction coordinate transition-state theory (VRC-TST). As a result, the rate constants show negative temperature and positive pressure dependence. The atmospheric lifetime and global warming potentials of acrylic acid have been calculated. Overall, the current study elucidates a new mechanism for the atmospheric reaction of chlorine atoms with acrylic acid.
Collapse
Affiliation(s)
- Jingyu Sun
- Hubei Collaborative Innovation Center for Rare Metal Chemistry, Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, College of Chemistry and Chemical Engineering, Hubei Normal University, Cihu Road 11, Huangshi, 435002, Hubei, People's Republic of China.
| | - Han Chu
- Hubei Collaborative Innovation Center for Rare Metal Chemistry, Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, College of Chemistry and Chemical Engineering, Hubei Normal University, Cihu Road 11, Huangshi, 435002, Hubei, People's Republic of China
| | - Wenzhong Wu
- College of Foreign Languages, Hubei Normal University, Cihu Road 11, Huangshi, 435002, Hubei, People's Republic of China
| | - Fang Chen
- Hubei Collaborative Innovation Center for Rare Metal Chemistry, Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, College of Chemistry and Chemical Engineering, Hubei Normal University, Cihu Road 11, Huangshi, 435002, Hubei, People's Republic of China
| | - Yanan Sun
- Hubei Collaborative Innovation Center for Rare Metal Chemistry, Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, College of Chemistry and Chemical Engineering, Hubei Normal University, Cihu Road 11, Huangshi, 435002, Hubei, People's Republic of China
| | - Jiangyan Liu
- Hubei Collaborative Innovation Center for Rare Metal Chemistry, Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, College of Chemistry and Chemical Engineering, Hubei Normal University, Cihu Road 11, Huangshi, 435002, Hubei, People's Republic of China
| | - Youxiang Shao
- School of Materials Science and Engineering, PCFM Lab, Sun Yat-sen University, Guangzhou, 510275, People's Republic of China.
| | - Yizhen Tang
- School of Environmental and municipal Engineering, Qingdao University of Technology, Fushun Road 11, Qingdao, 266033, Shandong, People's Republic of China
| |
Collapse
|
5
|
Bi FL, Xi ZH, Zhao L. Reaction Mechanisms and Kinetics of the Melt Transesterification of Bisphenol-A and Diphenyl Carbonate. INT J CHEM KINET 2018. [DOI: 10.1002/kin.21151] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Feng-Lei Bi
- Shanghai Key Laboratory of Multiphase Materials Chemical Engineering; East China University of Science and Technology; Shanghai 200237 People's Republic of China
| | - Zhen-Hao Xi
- Shanghai Key Laboratory of Multiphase Materials Chemical Engineering; East China University of Science and Technology; Shanghai 200237 People's Republic of China
| | - Ling Zhao
- Shanghai Key Laboratory of Multiphase Materials Chemical Engineering; East China University of Science and Technology; Shanghai 200237 People's Republic of China
| |
Collapse
|
6
|
Ng M, Mok DKW, Lee EPF, Dyke JM. The Atmospherically Important Reaction of Hydroxyl Radicals with Methyl Nitrate: A Theoretical Study Involving the Calculation of Reaction Mechanisms, Enthalpies, Activation Energies, and Rate Coefficients. J Phys Chem A 2017; 121:6554-6567. [DOI: 10.1021/acs.jpca.7b05035] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Maggie Ng
- Department
of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hung Hom, Hong Kong
| | - Daniel K. W. Mok
- Department
of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hung Hom, Hong Kong
| | - Edmond P. F. Lee
- Department
of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hung Hom, Hong Kong
- School
of Chemistry, University of Southampton, Southampton SO17 1BJ, U.K
| | - John M. Dyke
- School
of Chemistry, University of Southampton, Southampton SO17 1BJ, U.K
| |
Collapse
|
7
|
Meisner J, Kästner J. Atom Tunneling in Chemistry. Angew Chem Int Ed Engl 2016; 55:5400-13. [DOI: 10.1002/anie.201511028] [Citation(s) in RCA: 140] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2015] [Revised: 01/08/2016] [Indexed: 01/01/2023]
Affiliation(s)
- Jan Meisner
- Institut für Theoretische Chemie Universität Stuttgart Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Johannes Kästner
- Institut für Theoretische Chemie Universität Stuttgart Pfaffenwaldring 55 70569 Stuttgart Germany
| |
Collapse
|
8
|
Affiliation(s)
- Jan Meisner
- Institut für Theoretische Chemie Universität Stuttgart Pfaffenwaldring 55 70569 Stuttgart Deutschland
| | - Johannes Kästner
- Institut für Theoretische Chemie Universität Stuttgart Pfaffenwaldring 55 70569 Stuttgart Deutschland
| |
Collapse
|
9
|
Chow R, Mok DKW, Lee EPF, Dyke JM. A theoretical study of the atmospherically important radical–radical reaction BrO + HO2; the product channel O2(a1Δg) + HOBr is formed with the highest rate. Phys Chem Chem Phys 2016; 18:30554-30569. [DOI: 10.1039/c6cp05877a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A theoretical study has been made of the BrO + HO2 reaction, a radical–radical reaction which contributes to ozone depletion in the atmosphere via production of HOBr.
Collapse
Affiliation(s)
- Ronald Chow
- Department of Applied Biology and Chemical Technology
- Hong Kong Polytechnic University
- Hung Hom
- China
| | - Daniel K. W. Mok
- Department of Applied Biology and Chemical Technology
- Hong Kong Polytechnic University
- Hung Hom
- China
| | - Edmond P. F. Lee
- Department of Applied Biology and Chemical Technology
- Hong Kong Polytechnic University
- Hung Hom
- China
- School of Chemistry
| | - John M. Dyke
- School of Chemistry
- University of Southampton
- Southampton SO17 1BJ
- UK
| |
Collapse
|
10
|
Ng M, Mok DK, Lee EP, Dyke JM. A theoretical investigation of the atmospherically important reaction between chlorine atoms and formic acid: determination of the reaction mechanism and calculation of the rate coefficient at different temperatures. Mol Phys 2015. [DOI: 10.1080/00268976.2014.980448] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Maggie Ng
- Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hung Hom, Hong Kong
| | - Daniel K.W. Mok
- Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hung Hom, Hong Kong
| | - Edmond P.F. Lee
- Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hung Hom, Hong Kong
- School of Chemistry, Faculty of Natural and Environmental Sciences, University of Southampton, Southampton, UK
| | - John M. Dyke
- School of Chemistry, Faculty of Natural and Environmental Sciences, University of Southampton, Southampton, UK
| |
Collapse
|
11
|
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).
| |
Collapse
|
12
|
Ng M, Mok DKW, Lee EPF, Dyke JM. A theoretical study of the mechanism of the atmospherically relevant reaction of chlorine atoms with methyl nitrate, and calculation of the reaction rate coefficients at temperatures relevant to the troposphere. Phys Chem Chem Phys 2015; 17:7463-76. [DOI: 10.1039/c4cp06007e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Computed rate coefficients of the atmospherically important Cl + CH3ONO2 → HCl + CH2ONO2 reaction reported for the first time.
Collapse
Affiliation(s)
- Maggie Ng
- Department of Applied Biology and Chemical Technology
- Hong Kong Polytechnic University
- Hung Hom
- Hong Kong
| | - Daniel K. W. Mok
- Department of Applied Biology and Chemical Technology
- Hong Kong Polytechnic University
- Hung Hom
- Hong Kong
| | - Edmond P. F. Lee
- Department of Applied Biology and Chemical Technology
- Hong Kong Polytechnic University
- Hung Hom
- Hong Kong
- School of Chemistry
| | - John M. Dyke
- School of Chemistry
- University of Southampton
- Southampton SO17 1BJ
- UK
| |
Collapse
|
13
|
Alwe HD, Sharma A, Walavalkar MP, Dhanya S, Naik PD. Reactivity of Cl atom with triple-bonded molecules. An experimental and theoretical study with alcohols. J Phys Chem A 2014; 118:7695-706. [PMID: 25146879 DOI: 10.1021/jp5050783] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The reactivities of the Cl atom with triple-bonded molecules were examined by determining the rate coefficients of reactions of four triple-bonded alcohols (TA), namely, 2-propyn-1-ol, 3-butyn-1-ol, 3-butyn-2-ol, and 2-methyl-3-butyn-2-ol, using the relative rate method, at 298 K. The rate coefficients (k) of reaction of the four alcohols with Cl vary in the range (3.5-4.3) × 10(-10) cm(3) molecule(-1) s(-1). These values imply significant contribution of the Cl reaction in the tropospheric degradation of TAs in the conditions of the marine boundary layer. A striking difference is observed in the reactivity trend of Cl from that of OH/O3. Although the reactivity of OH/O3 is lower with triple-bonded molecules, as compared to the double-bonded analogues, the reactivity of the Cl atom is similar for both. For a deeper insight, the reactions of Cl and OH with the simplest TA, 2-propyn-1-ol, are investigated theoretically. Conventional transition state theory is applied to compute the values of k, using the calculated energies at QCISD and QCISD(T) levels of theory of the optimized geometries of the reactants, transition states (TS), and the product radicals of all the possible reaction pathways at the MP2/6-311++G(d,p) level. The k values calculated at the QCISD level for Cl and the QCISD(T) level for OH reactions are found to be very close to the experimental values at 298 K. In the case of the Cl reaction, the abstraction of α-H atoms as well as the addition at the terminal and middle carbon atoms have submerged TS and the contribution of the abstraction reaction is found to be significant at room temperature, at all levels of calculations. Addition at the terminal carbon atom is prominent compared to that at the middle carbon. In contrast to the Cl reaction, only addition at the middle carbon is associated with such low lying TS in the case of OH. The individual rate coefficients of addition and abstraction of OH are lower than that of Cl. The negative temperature dependence of the computed rate coefficients in the temperature range 200-400 K shows that the difference in the TS energy of Cl and OH affects the pre-exponential factor more than the activation energy.
Collapse
Affiliation(s)
- H D Alwe
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre , Trombay, Mumbai, India 400 085
| | | | | | | | | |
Collapse
|
14
|
The reaction mechanisms and kinetics of CF3CHFOCH3 and CHF2CHFOCF3 with atomic chlorine: a computational study. J Mol Model 2014; 20:2435. [DOI: 10.1007/s00894-014-2435-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2014] [Accepted: 08/25/2014] [Indexed: 10/24/2022]
|
15
|
Bai F, Sun Y, Wang X, Jia Z, Wang R, Pan X. Theoretical investigation of the mechanisms and dynamics of the reaction CHF2OCF 2CHFCl+Cl. J Mol Model 2014; 20:2419. [PMID: 25129661 DOI: 10.1007/s00894-014-2419-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2014] [Accepted: 07/16/2014] [Indexed: 11/28/2022]
Abstract
The reaction of CHF2OCF2CHFCl with atomic chlorine was studied using B3LYP/6-311G(d,p), BHandHLYP/6-311G(d,p), and M06-2X/6-311G(d,p) methods and further using CCSD(T) and QCISD(T) methods. Two hydrogen abstraction channels were found for the title reaction. Dynamics calculations were followed by means of canonical variational transition state with the small-curvature tunneling correction between 220 and 2,000 K. Our rate constant k = 2.90 × 10(-15) cm(3) molecule(-1) s(-1) is in reasonable agreement with the available data (3.20 ± 0.32) × 10(-15) cm(3) molecule(-1) s(-1) at 296 K. The three-parameter Arrhenius expression (in the unit of cm(3) molecule(-1) s(-1)) for the title reaction is given as k (T) = 1.38 × 10 (-19) T (2.57) exp (-2622.95/T).
Collapse
Affiliation(s)
- Fengyang Bai
- Faculty of Chemistry, Institute of Functional Material Chemistry, Northeast Normal University, 130024, Changchun, People's Republic of China
| | | | | | | | | | | |
Collapse
|
16
|
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]
|
17
|
Liu FY, Long ZW, Tan XF, Long B. Theoretical investigation on mechanisms and kinetics of the reactions of Cl atom with CH3OOH and CH3CH2OOH. COMPUT THEOR CHEM 2014. [DOI: 10.1016/j.comptc.2014.04.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|