1
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Si H, Xiang T. Theoretical study of the radical–radical reactions between HOCH2OO and OH. Theor Chem Acc 2022. [DOI: 10.1007/s00214-022-02900-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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2
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Bryukov MG, Vasilyak LM, Vasiliev AI, Kostyuchenko SV, Kudryavtsev NN. Low-Temperature Oxidation of Hydrogen Sulfide and Formaldehyde Pollutants in Humid Air by UV Radiation at 184.95 and 253.65 nm. J Phys Chem A 2020; 124:7935-7942. [PMID: 32894938 DOI: 10.1021/acs.jpca.0c06552] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
An experimental study of the oxidation of hydrogen sulfide and formaldehyde impurities in humid air by ultraviolet radiation at wavelengths of 184.95 and 253.65 nm has been carried out at a pressure of 1 atm, an initial temperature of 20 °C, a relative humidity of 90%, and a flow rate of the gas mixture of 4920 m3/h. The initial concentrations of hydrogen sulfide and formaldehyde in air ranged from 8 to 20 and from 2.9 to 7.2 mg/m3, respectively. The photochemical kinetic mechanism was proposed for a numerical simulation of the low-temperature photooxidation of hydrogen sulfide and formaldehyde pollutants as well as the formation of ozone in humid air. The mechanism consists of 7 and 4 photochemical reactions initiated by UV radiation at wavelengths of 184.95 and 253.65 nm, respectively, and 62 reversible individual chemical reactions involving 32 chemical species (radicals, atoms, and molecules). The obtained results of numerical simulation are in good agreement with experimental data.
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Affiliation(s)
- Mikhail G Bryukov
- N. N. Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences, 4 Kosygina St., Bld 1, Moscow 119991, Russian Federation.,NPO LIT, Bld. 1, 44 Krasnobogatyrskaya st., Moscow 107076, Russian Federation
| | - Leonid M Vasilyak
- Joint Institute for High Temperatures of Russian Academy of Sciences, Bld. 2, 13 Izhorskaya st., Moscow 125412, Russian Federation
| | | | | | - Nickolay N Kudryavtsev
- Moscow Institute of Physics and Technology, 9 Institutskiy Per., Dolgoprudny., Moscow Region 141701, Russian Federation
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3
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Allen HM, Crounse JD, Bates KH, Teng AP, Krawiec-Thayer MP, Rivera-Rios JC, Keutsch FN, St. Clair JM, Hanisco TF, Møller KH, Kjaergaard HG, Wennberg PO. Kinetics and Product Yields of the OH Initiated Oxidation of Hydroxymethyl Hydroperoxide. J Phys Chem A 2018; 122:6292-6302. [DOI: 10.1021/acs.jpca.8b04577] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | | | | | | | - Jean C. Rivera-Rios
- Paulson School of Engineering and Applied Sciences and Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Frank N. Keutsch
- Paulson School of Engineering and Applied Sciences and Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Jason M. St. Clair
- Joint Center for Earth Systems Technology, University of Maryland Baltimore County, Baltimore, Maryland 21228, United States
- Atmospheric Chemistry and Dynamics Laboratory, NASA Goddard Space Flight Center, Greenbelt, Maryland 20771, United States
| | - Thomas F. Hanisco
- Atmospheric Chemistry and Dynamics Laboratory, NASA Goddard Space Flight Center, Greenbelt, Maryland 20771, United States
| | - Kristian H. Møller
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, Denmark
| | - Henrik G. Kjaergaard
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, Denmark
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4
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Zhao Q, Liu F, Wang W, Li C, Lü J, Wang W. Reactions between hydroxyl-substituted alkylperoxy radicals and Criegee intermediates: correlations of the electronic characteristics of methyl substituents and the reactivity. Phys Chem Chem Phys 2017; 19:15073-15083. [DOI: 10.1039/c7cp00869d] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Methyl substituents tune ΔE and ΔG, thereby exhibiting correlations with spin population, interatomic distance, E(2) and NPA charges in their transition states.
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Affiliation(s)
- Qiangli Zhao
- Key Laboratory for Macromolecular Science of Shaanxi Province
- School of Chemistry and Chemical Engineering
- Shaanxi Normal University
- Xi'an 710062
- China
| | - Fengyi Liu
- Key Laboratory for Macromolecular Science of Shaanxi Province
- School of Chemistry and Chemical Engineering
- Shaanxi Normal University
- Xi'an 710062
- China
| | - Weina Wang
- Key Laboratory for Macromolecular Science of Shaanxi Province
- School of Chemistry and Chemical Engineering
- Shaanxi Normal University
- Xi'an 710062
- China
| | - Chunying Li
- Xi'an Modern Chemistry Research Institute
- Xi'an 710065
- China
| | - Jian Lü
- Xi'an Modern Chemistry Research Institute
- Xi'an 710065
- China
| | - Wenliang Wang
- Key Laboratory for Macromolecular Science of Shaanxi Province
- School of Chemistry and Chemical Engineering
- Shaanxi Normal University
- Xi'an 710062
- China
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5
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Shao Y, Hou H, Wang B. Theoretical study of the mechanisms and kinetics of the reactions of hydroperoxy (HO2) radicals with hydroxymethylperoxy (HOCH2O2) and methoxymethylperoxy (CH3OCH2O2) radicals. Phys Chem Chem Phys 2014; 16:22805-14. [PMID: 25243915 DOI: 10.1039/c4cp02747g] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The peroxy–peroxy radical reactions show spin, conformation and temperature dependence, forming formic acid and hydroxyl radicals.
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Affiliation(s)
- Youxiang Shao
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan, People's Republic of China
| | - Hua Hou
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan, People's Republic of China
| | - Baoshan Wang
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan, People's Republic of China
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6
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Morajkar P, Schoemaecker C, Okumura M, Fittschen C. Direct Measurement of the Equilibrium Constants of the Reaction of Formaldehyde and Acetaldehyde with HO2
Radicals. INT J CHEM KINET 2013. [DOI: 10.1002/kin.20817] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Pranay Morajkar
- PhysicoChimie des Processus de Combustion et de l'Atmosphère-PC2A; UMR 8522; Université Lille Nord de France F-59650 Villeneuve d'Ascq France
| | - Coralie Schoemaecker
- PhysicoChimie des Processus de Combustion et de l'Atmosphère-PC2A; UMR 8522; Université Lille Nord de France F-59650 Villeneuve d'Ascq France
| | - Mitchio Okumura
- Division of Chemistry and Chemical Engineering; California Institute of Technology; Pasadena CA 91125 USA
| | - Christa Fittschen
- PhysicoChimie des Processus de Combustion et de l'Atmosphère-PC2A; UMR 8522; Université Lille Nord de France F-59650 Villeneuve d'Ascq France
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7
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Sprague MK, Mertens LA, Widgren HN, Okumura M, Sander SP, McCoy AB. Cavity Ringdown Spectroscopy of the Hydroxy-Methyl-Peroxy Radical. J Phys Chem A 2013; 117:10006-17. [DOI: 10.1021/jp400390y] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Matthew K. Sprague
- Arthur Amos Noyes Laboratory of Chemical
Physics, MC
127-72, California Institute of Technology, Pasadena, California 91125, United States
| | - Laura A. Mertens
- Arthur Amos Noyes Laboratory of Chemical
Physics, MC
127-72, California Institute of Technology, Pasadena, California 91125, United States
| | - Heather N. Widgren
- Arthur Amos Noyes Laboratory of Chemical
Physics, MC
127-72, California Institute of Technology, Pasadena, California 91125, United States
| | - Mitchio Okumura
- Arthur Amos Noyes Laboratory of Chemical
Physics, MC
127-72, California Institute of Technology, Pasadena, California 91125, United States
| | - Stanley P. Sander
- NASA Jet
Propulsion Laboratory, MC 183-901, California Institute of Technology, Pasadena, California
91109, United States
| | - Anne B. McCoy
- Department of Chemistry
and Biochemistry, The Ohio State University, Columbus,
Ohio 43210, United States
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8
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Grieman FJ, Noell AC, Davis-Van Atta C, Okumura M, Sander SP. Determination of Equilibrium Constants for the Reaction between Acetone and HO2 Using Infrared Kinetic Spectroscopy. J Phys Chem A 2011; 115:10527-38. [DOI: 10.1021/jp205347s] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Fred J. Grieman
- Seaver Chemistry Laboratory, Pomona College, Claremont, California 91711, United States
| | | | - Casey Davis-Van Atta
- Seaver Chemistry Laboratory, Pomona College, Claremont, California 91711, United States
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9
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Nguyen TL, Vereecken L, Peeters J. Theoretical Study of the HOCH2OO• + HO2
• Reaction: Detailed Molecular Mechanisms of the Three Reaction Channels. ACTA ACUST UNITED AC 2010. [DOI: 10.1524/zpch.2010.6142] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Abstract
The HO2
• + HOCH2OO• reaction was theoretically investigated, using various high-level, single-reference Complete Basis Set methods including CBS-QB3, CBS-QCI/APNO and CBS-Q(MPW1B95) and a new multi-reference CI-PT2 approach. Three major product channels under atmospheric conditions were identified and their molecular mechanisms elucidated in great detail by Intrinsic Reaction Coordinate Analyses (IRC) at the B3LYP/6–311G(d,p) level: (i) Direct head-to-tail H-atom abstraction from the hydroperoxy radical by the alkylperoxy, occurring on the triplet Potential Energy Surface (PES) leading to HOCH2OOH + O2; (ii) A two-step rearrangement of the initial singlet HOCH2OOOOH tetroxide complex to form HC(O)OH + •OH + HO2
•; (iii) A multi-step rearrangement of the initial HOCH2OOOOH tetroxide to yield HC(O)OH + O2(1Δ) + H2O, about twice as fast as the former channel on the singlet-surface. The findings provide an explanation for the observed hydroxyl radical formation in this reaction (Jenkin et al., Phys. Chem. Chem. Phys. 9 (2007) 3149) and rationalize the high overall rate and its pronounced negative temperature dependence (Veyret et al., J. Phys. Chem.
93 (1989) 2368).
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Affiliation(s)
| | - Luc Vereecken
- University of Leuven, Department of Chemistry, Leuven, Belgien
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10
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Horie O, Moortgat GK. Photolysis of Ketene-Oxygen Mixtures between 253 K and 323 K in Relation to the Formation of Criegee Intermediates. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bbpc.19920960332] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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11
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Kúti Z, Gál D. On the Mechanism of Methanol Oxidation Sensitized by Anthraquinone. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bbpc.19920961210] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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12
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Gratien A, Nilsson E, Doussin JF, Johnson MS, Nielsen CJ, Stenstrøm Y, Picquet-Varrault B. UV and IR Absorption Cross-sections of HCHO, HCDO, and DCDO. J Phys Chem A 2007; 111:11506-13. [DOI: 10.1021/jp074288r] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Aline Gratien
- Laboratoire Interuniversitaire des Systèmes Atmosphériques, UMR 7583, University of Paris 7 and Paris 12, Créteil, France, Copenhagen Center for Atmospheric Research, Department of Chemistry, University of Copenhagen, Universitetsparken 5 DK-2100 Copenhagen OE, Denmark, Centre for Theoretical and Computational Chemistry, Department of Chemistry, University of Oslo, Pb. 1033 − Blindern 0315 Oslo, Norway, and Norwegian University of Life Sciences, Department of Chemistry, Biotechnology and Food Science,
| | - Elna Nilsson
- Laboratoire Interuniversitaire des Systèmes Atmosphériques, UMR 7583, University of Paris 7 and Paris 12, Créteil, France, Copenhagen Center for Atmospheric Research, Department of Chemistry, University of Copenhagen, Universitetsparken 5 DK-2100 Copenhagen OE, Denmark, Centre for Theoretical and Computational Chemistry, Department of Chemistry, University of Oslo, Pb. 1033 − Blindern 0315 Oslo, Norway, and Norwegian University of Life Sciences, Department of Chemistry, Biotechnology and Food Science,
| | - Jean-Francois Doussin
- Laboratoire Interuniversitaire des Systèmes Atmosphériques, UMR 7583, University of Paris 7 and Paris 12, Créteil, France, Copenhagen Center for Atmospheric Research, Department of Chemistry, University of Copenhagen, Universitetsparken 5 DK-2100 Copenhagen OE, Denmark, Centre for Theoretical and Computational Chemistry, Department of Chemistry, University of Oslo, Pb. 1033 − Blindern 0315 Oslo, Norway, and Norwegian University of Life Sciences, Department of Chemistry, Biotechnology and Food Science,
| | - Matthew S. Johnson
- Laboratoire Interuniversitaire des Systèmes Atmosphériques, UMR 7583, University of Paris 7 and Paris 12, Créteil, France, Copenhagen Center for Atmospheric Research, Department of Chemistry, University of Copenhagen, Universitetsparken 5 DK-2100 Copenhagen OE, Denmark, Centre for Theoretical and Computational Chemistry, Department of Chemistry, University of Oslo, Pb. 1033 − Blindern 0315 Oslo, Norway, and Norwegian University of Life Sciences, Department of Chemistry, Biotechnology and Food Science,
| | - Claus J. Nielsen
- Laboratoire Interuniversitaire des Systèmes Atmosphériques, UMR 7583, University of Paris 7 and Paris 12, Créteil, France, Copenhagen Center for Atmospheric Research, Department of Chemistry, University of Copenhagen, Universitetsparken 5 DK-2100 Copenhagen OE, Denmark, Centre for Theoretical and Computational Chemistry, Department of Chemistry, University of Oslo, Pb. 1033 − Blindern 0315 Oslo, Norway, and Norwegian University of Life Sciences, Department of Chemistry, Biotechnology and Food Science,
| | - Yngve Stenstrøm
- Laboratoire Interuniversitaire des Systèmes Atmosphériques, UMR 7583, University of Paris 7 and Paris 12, Créteil, France, Copenhagen Center for Atmospheric Research, Department of Chemistry, University of Copenhagen, Universitetsparken 5 DK-2100 Copenhagen OE, Denmark, Centre for Theoretical and Computational Chemistry, Department of Chemistry, University of Oslo, Pb. 1033 − Blindern 0315 Oslo, Norway, and Norwegian University of Life Sciences, Department of Chemistry, Biotechnology and Food Science,
| | - Bénédicte Picquet-Varrault
- Laboratoire Interuniversitaire des Systèmes Atmosphériques, UMR 7583, University of Paris 7 and Paris 12, Créteil, France, Copenhagen Center for Atmospheric Research, Department of Chemistry, University of Copenhagen, Universitetsparken 5 DK-2100 Copenhagen OE, Denmark, Centre for Theoretical and Computational Chemistry, Department of Chemistry, University of Oslo, Pb. 1033 − Blindern 0315 Oslo, Norway, and Norwegian University of Life Sciences, Department of Chemistry, Biotechnology and Food Science,
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13
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Sulbaek Andersen MP, Nielsen OJ, Hurley MD, Ball JC, Wallington TJ, Ellis DA, Martin JW, Mabury SA. Atmospheric chemistry of 4:2 fluorotelomer alcohol (n-C4F9CH2CH2OH): products and mechanism of Cl atom initiated oxidation in the presence of NOx. J Phys Chem A 2007; 109:1849-56. [PMID: 16833516 DOI: 10.1021/jp045672g] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Smog chamber/FTIR techniques were used to study the Cl atom initiated oxidation of 4:2 fluorotelomer alcohol (C(4)F(9)CH(2)CH(2)OH, 4:2 FTOH) in the presence of NO(x) in 700 Torr of N(2)/O(2) diluent at 296 K. Chemical activation effects play an important role in the atmospheric chemistry of the peroxy, and possibly the alkoxy, radicals derived from 4:2 FTOH. Cl atoms react with C(4)F(9)CH(2)CH(2)OH to give C(4)F(9)CH(2)C(*)HOH radicals which add O(2) to give chemically activated alpha-hydroxyperoxy radicals, [C(4)F(9)CH(2)C(OO(*))HOH]*. In 700 Torr of N(2)/O(2) at 296 K, approximately 50% of the [C(4)F(9)CH(2)C(OO(*))HOH]* radicals decompose "promptly" to give HO(2) radicals and C(4)F(9)CH(2)CHO, the remaining [C(4)F(9)CH(2)C(OO(*))HOH]* radicals undergo collisional deactivation to give thermalized peroxy radicals, C(4)F(9)CH(2)C(OO(*))HOH. Decomposition to HO(2) and C(4)F(9)CH(2)CHO is the dominant atmospheric fate of the thermalized peroxy radicals. In the presence of excess NO, the thermalized peroxy radicals react to give C(4)F(9)CH(2)C(O(*))HOH radicals which then decompose at a rate >2.5 x 10(6) s(-1) to give HC(O)OH and the alkyl radical C(4)F(9)CH(2)(*). The primary products of 4:2 FTOH oxidation in the presence of excess NO(x) are C(4)F(9)CH(2)CHO, C(4)F(9)CHO, and HCOOH. Secondary products include C(4)F(9)CH(2)C(O)O(2)NO(2), C(4)F(9)C(O)O(2)NO(2), and COF(2). In contrast to experiments conducted in the absence of NO(x), there was no evidence (<2% yield) for the formation of the perfluorinated acid C(4)F(9)C(O)OH. The results are discussed with regard to the atmospheric chemistry of fluorotelomer alcohols.
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Affiliation(s)
- M P Sulbaek Andersen
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen, Denmark
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14
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Hou H, Wang B. A systematic computational study on the reactions of HO2 with RO2: The HO2 + CH3O2(CD3O2) and HO2 + CH2FO2 reactions. J Phys Chem A 2007; 109:451-60. [PMID: 16833365 DOI: 10.1021/jp046329e] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A systematic theoretical study of the reactions of HO2 with RO2 has been carried out. The major concern of the present work is to gain insight into the reaction mechanism and then to explain experimental observations and to predict new product channels for this class of reactions of importance in the atmosphere. In this paper, the reaction mechanisms for two reactions, namely, HO2 + CH3O2 and HO2 + CH2FO2, are reported. Both singlet and triplet potential energy surfaces are investigated. The complexity of the present system makes it impossible to use a single ab initio method to map out all the reaction paths. Various ab initio methods including MP2, CISD, QCISD(T), CCSD(T), CASSCF, and density function theory (B3LYP) have been employed with the basis sets ranging from 6-31G(d) to an extrapolated complete basis set (CBS) limit. It has been established that the CCSD(T)/cc-pVDZ//B3LYP/6-311G(d,p) scheme represents the most feasible method for our systematic study. For the HO2 + CH3O2 reaction, the production of CH3OOH is determined to be the dominant channel. For the HO2 + CH2FO2 reaction, both CH2FOOH and CHFO are major products, whereas the formation of CHFO is dominant in the overall reaction. The computational findings give a fair explanation for the experimental observation of the products.
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Affiliation(s)
- Hua Hou
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, People's Republic of China
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15
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Jenkin ME, Hurley MD, Wallington TJ. Investigation of the radical product channel of the CH3C(O)O2 + HO2 reaction in the gas phase. Phys Chem Chem Phys 2007; 9:3149-62. [PMID: 17612738 DOI: 10.1039/b702757e] [Citation(s) in RCA: 112] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reaction of CH(3)C(O)O(2) with HO(2) has been investigated at 296 K and 700 Torr using long path FTIR spectroscopy, during photolysis of Cl(2)/CH(3)CHO/CH(3)OH/air mixtures. The branching ratio for the reaction channel forming CH(3)C(O)O, OH and O(2) (reaction ) has been determined from experiments in which OH radicals were scavenged by addition of benzene to the system, with subsequent formation of phenol used as the primary diagnostic for OH radical formation. The dependence of the phenol yield on benzene concentration was found to be consistent with its formation from the OH-initiated oxidation of benzene, thereby confirming the presence of OH radicals in the system. The dependence of the phenol yield on the initial peroxy radical precursor reagent concentration ratio, [CH(3)OH](0)/[CH(3)CHO](0), is consistent with OH formation resulting mainly from the reaction of CH(3)C(O)O(2) with HO(2) in the early stages of the experiments, such that the limiting yield of phenol at high benzene concentrations is well-correlated with that of CH(3)C(O)OOH, a well-established product of the CH(3)C(O)O(2) + HO(2) reaction (via channel (3a)). However, a delayed source of phenol was also identified, which is attributed mainly to an analogous OH-forming channel of the reaction of HO(2) with HOCH(2)O(2) (reaction ), formed from the reaction of HO(2) with product HCHO. This was investigated in additional series of experiments in which Cl(2)/CH(3)OH/benzene/air and Cl(2)/HCHO/benzene/air mixtures were photolysed. The various reaction systems were fully characterised by simulations using a detailed chemical mechanism. This allowed the following branching ratios to be determined: CH(3)C(O)O(2) + HO(2)--> CH(3)C(O)OOH + O(2), k(3a)/k(3) = 0.38 +/- 0.13; --> CH(3)C(O)OH + O(3), k(3b)/k(3) = 0.12 +/- 0.04; --> CH(3)C(O)O + OH + O(2), k(3c)/k(3) = 0.43 +/- 0.10: HOCH(2)O(2) + HO(2)--> HCOOH + H(2)O + O(2), k(17b)/k(17) = 0.30 +/- 0.06; --> HOCH(2)O + OH + O(2), k(17c)/k(17) = 0.20 +/- 0.05. The results therefore provide strong evidence for significant participation of the radical-forming channels of these reactions, with the branching ratio for the title reaction being in good agreement with the value reported in one previous study. As part of this work, the kinetics of the reaction of Cl atoms with phenol (reaction (14)) have also been investigated. The rate coefficient was determined relative to the rate coefficient for the reaction of Cl with CH(3)OH, during the photolysis of mixtures of Cl(2), phenol and CH(3)OH, in either N(2) or air at 296 K and 760 Torr. A value of k(14) = (1.92 +/- 0.17) x 10(-10) cm(3) molecule(-1) s(-1) was determined from the experiments in N(2), in agreement with the literature. In air, the apparent rate coefficient was about a factor of two lower, which is interpreted in terms of regeneration of phenol from the product phenoxy radical, C(6)H(5)O, possibly via its reaction with HO(2).
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Affiliation(s)
- M E Jenkin
- Centre for Environmental Policy, Imperial College London, Silwood Park, Ascot, Berkshire, UK.
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17
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18
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Li QS, Zhang X, Zhang SW. Direct Dynamics Study on the Hydrogen Abstraction Reaction CH2O + HO2 → CHO + H2O2. J Phys Chem A 2005; 109:12027-35. [PMID: 16366658 DOI: 10.1021/jp054884q] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We present a direct ab initio dynamics study on the hydrogen abstraction reaction CH2O + HO2 --> CHO + H2O2, which is predicted to have four possible reaction channels caused by different attacking orientations of HO2 radical to CH2O. The structures and frequencies at the stationary points and the points along the minimum energy paths (MEPs) of the four reaction channels are calculated at the B3LYP/cc-pVTZ level of theory. Energetic information of stationary points and the points along the MEPs is further refined by means of some single-point multilevel energy calculations (HL). The rate constants of these channels are calculated using the improved canonical variational transition-state theory with the small-curvature tunneling correction (ICVT/SCT) method. The calculated results show that, in the whole temperature range, the more favorable reaction channels are Channels 1 and 3. The total ICVT/SCT rate constants of the four channels at the HL//B3LYP/cc-pVTZ level of theory are in good agreement with the available experiment data over the measured temperature ranges, and the corresponding three-parameter expression is k(ICVT/SCT) = 3.13 x 10(-20) T(2.70) exp(-11.52/RT) cm3 mole(-1) s(-1) in the temperature range of 250-3000 K. Additionally, the flexibility of the dihedral angle of H2O2 is also discussed to explain the different experimental values.
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Affiliation(s)
- Qian Shu Li
- The Institute for Chemical Physics, Beijing Institute of Technology, Beijing 100081, People's Republic of China.
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Pinceloup S, Laverdet G, Maguin F, Doussin JF, Carlier P, Le Bras G. Laboratory investigation of the photooxidation of formaldehyde combining FTIR analysis of stable species and HO2 detection by the chemical amplifier technique. J Photochem Photobiol A Chem 2003. [DOI: 10.1016/s1010-6030(03)00066-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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20
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Sumner AL, Shepson PB, Couch TL, Thornberry T, Carroll MA, Sillman S, Pippin M, Bertman S, Tan D, Faloona I, Brune W, Young V, Cooper O, Moody J, Stockwell W. A study of formaldehyde chemistry above a forest canopy. ACTA ACUST UNITED AC 2001. [DOI: 10.1029/2000jd900761] [Citation(s) in RCA: 64] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Tyndall GS, Cox RA, Granier C, Lesclaux R, Moortgat GK, Pilling MJ, Ravishankara AR, Wallington TJ. Atmospheric chemistry of small organic peroxy radicals. ACTA ACUST UNITED AC 2001. [DOI: 10.1029/2000jd900746] [Citation(s) in RCA: 287] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Crehuet R, Anglada JM, Bofill JM. Tropospheric formation of hydroxymethyl hydroperoxide, formic acid, H2O2, and OH from carbonyl oxide in the presence of water vapor: a theoretical study of the reaction mechanism. Chemistry 2001; 7:2227-35. [PMID: 11411994 DOI: 10.1002/1521-3765(20010518)7:10<2227::aid-chem2227>3.0.co;2-o] [Citation(s) in RCA: 83] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
We have carried out a theoretical investigation of the gas-phase reaction mechanism of the H2COO+ H2O reaction, which is interesting for atmospheric purposes. The B3LYP method with the 6-31G(d,p) and 6-311 + G(2d,2p) basis sets was employed for the geometry optimization of the stationary points. Additionally, single-point CCSD(T)/6-311 + G(2d,2p) energy calculations have been done for the B3LYP/6-311 + G(2d,2p) optimized structures. The reaction begins with the formation of a hydrogen-bond complex that we have calculated to be 6 kcalmol(-1) more stable than the reactants. Then, the reaction follows two different channels. The first one leads to the formation of hydroxymethyl hydroperoxide (HMHP), for which we have calculated an activation barrier of deltaGa(298) = 11.3 kcalmol(-1), while the second one gives HCO + OH + H2O, with a calculated activation barrier of deltaGa(298) = 20.9 kcalmol(-1). This process corresponds to the water-catalyzed decomposition of H2COO, and its unimolecular decomposition has been previously reported in the literature. Additionally, we have also investigated the HMHP decomposition. We have found two reaction modes that yield HCOOH+H2O; one reaction mode leads to H2CO + H2O2 and a homolytic cleavage, which produces H2COOH + OH radicals. Furthermore, we have also investigated the water-assisted HMHP decomposition, which produces a catalytic effect of about 14 kcalmol(-1) in the process that leads to H2CO + H2O2.
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Affiliation(s)
- R Crehuet
- Institut d'Investigacions Químiques i Ambientals de Barcelona, Departament de Química Orgànica Biològica, Barcelona, Spain
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Glasius M, Boel C, Bruun N, Easa LM, Hornung P, Klausen HS, Klitgaard KC, Lindeskov C, Møller CK, Nissen H, Petersen APF, Kleefeld S, Boaretto E, Hansen TS, Heinemeier J, Lohse C. Relative contribution of biogenic and anthropogenic sources to formic and acetic acids in the atmospheric boundary layer. ACTA ACUST UNITED AC 2001. [DOI: 10.1029/2000jd900676] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Tomas A, Villenave E, Lesclaux R. Reactions of the HO2 Radical with CH3CHO and CH3C(O)O2 in the Gas Phase. J Phys Chem A 2001. [DOI: 10.1021/jp003762p] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alexandre Tomas
- Laboratoire de Physico-Chimie Moléculaire, UMR 5803 CNRS, Université Bordeaux I, 33405 Talence Cedex, France
| | - Eric Villenave
- Laboratoire de Physico-Chimie Moléculaire, UMR 5803 CNRS, Université Bordeaux I, 33405 Talence Cedex, France
| | - Robert Lesclaux
- Laboratoire de Physico-Chimie Moléculaire, UMR 5803 CNRS, Université Bordeaux I, 33405 Talence Cedex, France
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Knight GP, Beiderhase T, Helleis F, Moortgat GK, Crowley JN. Reaction of HO2 with ClO: Flow Tube Studies of Kinetics and Product Formation between 215 and 298 K. J Phys Chem A 2000. [DOI: 10.1021/jp9924631] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- G. P. Knight
- Division of Atmospheric Chemistry, Max-Planck-Institut für Chemie, Postfach 3060, 55020 Mainz, Germany
| | - T. Beiderhase
- Division of Atmospheric Chemistry, Max-Planck-Institut für Chemie, Postfach 3060, 55020 Mainz, Germany
| | - F. Helleis
- Division of Atmospheric Chemistry, Max-Planck-Institut für Chemie, Postfach 3060, 55020 Mainz, Germany
| | - G. K. Moortgat
- Division of Atmospheric Chemistry, Max-Planck-Institut für Chemie, Postfach 3060, 55020 Mainz, Germany
| | - J. N. Crowley
- Division of Atmospheric Chemistry, Max-Planck-Institut für Chemie, Postfach 3060, 55020 Mainz, Germany
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Horie O, Moortgat GK. Gas-Phase Ozonolysis of Alkenes. Recent Advances in Mechanistic Investigations. Acc Chem Res 1998. [DOI: 10.1021/ar9702740] [Citation(s) in RCA: 106] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Osamu Horie
- Max Planck Institute for Chemistry, Division of Atmospheric Chemistry, Postfach 3060, D-55020 Mainz, Germany
| | - Geert K. Moortgat
- Max Planck Institute for Chemistry, Division of Atmospheric Chemistry, Postfach 3060, D-55020 Mainz, Germany
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Sehested J, Møgelberg T, Wallington TJ, Kaiser EW, Nielsen OJ. Dimethyl Ether Oxidation: Kinetics and Mechanism of the CH3OCH2 + O2 Reaction at 296 K and 0.38−940 Torr Total Pressure. ACTA ACUST UNITED AC 1996. [DOI: 10.1021/jp961821m] [Citation(s) in RCA: 66] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | | | | | - O. J. Nielsen
- Ford Motor Company, Ford Forschungszentrum Aachen, Dennewartsstrasse 25, D-52068 Aachen, Germany
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28
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Benson SW. Some Observations on the Thermochemistry and Kinetics of Peroxy Radicals. ACTA ACUST UNITED AC 1996. [DOI: 10.1021/jp960448f] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sidney W. Benson
- Hydrocarbon Research Institute, Chemistry Department, University Park, MC 1661, University of Southern California, Los Angeles, California 90089-1661
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A method of calibration of the formic acid monomer concentration in the gas phase. ACTA ACUST UNITED AC 1995. [DOI: 10.1007/bf00322726] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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30
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Staffelbach TA, Orlando JJ, Tyndall GS, Calvert JG. The UV-visible absorption spectrum and photolysis quantum yields of methylglyoxal. ACTA ACUST UNITED AC 1995. [DOI: 10.1029/95jd00541] [Citation(s) in RCA: 52] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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31
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Wallington TJ, Hurley MD, Schneider WF, Sehested J, Nielsen OJ. Mechanistic study of the gas-phase reaction of CH2FO2 radicals with HO2. Chem Phys Lett 1994. [DOI: 10.1016/0009-2614(93)e1466-t] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Hatakeyama S, Akimoto H. Reactions of criegee intermediates in the gas phase. RESEARCH ON CHEMICAL INTERMEDIATES 1994. [DOI: 10.1163/156856794x00432] [Citation(s) in RCA: 154] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Wallington TJ, Hurley MD, Ball JC, Jenkin ME. FTIR product study of the reaction of CH3OCH2O2+HO2. Chem Phys Lett 1993. [DOI: 10.1016/0009-2614(93)80049-u] [Citation(s) in RCA: 63] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Lightfoot P, Cox R, Crowley J, Destriau M, Hayman G, Jenkin M, Moortgat G, Zabel F. Organic peroxy radicals: Kinetics, spectroscopy and tropospheric chemistry. ACTA ACUST UNITED AC 1992. [DOI: 10.1016/0960-1686(92)90423-i] [Citation(s) in RCA: 571] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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36
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Analysis of reaction products in the oxidation reactions of hydrocarbons by means of matrix-isolation FTIR spectroscopy. ACTA ACUST UNITED AC 1991. [DOI: 10.1007/bf00321527] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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38
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Horie O, Moortgat G. Decomposition pathways of the excited Criegee intermediates in the ozonolysis of simple alkenes. ACTA ACUST UNITED AC 1991. [DOI: 10.1016/0960-1686(91)90271-8] [Citation(s) in RCA: 130] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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39
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Wallington TJ, Andino JM, Japar SM. FTIR product study of the self-reaction of CH2ClCH2O2 radicals in air at 295 K. Chem Phys Lett 1990. [DOI: 10.1016/0009-2614(90)85427-e] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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40
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Arlander DW, Cronn DR, Farmer JC, Menzia FA, Westberg HH. Gaseous oxygenated hydrocarbons in the remote marine troposphere. ACTA ACUST UNITED AC 1990. [DOI: 10.1029/jd095id10p16391] [Citation(s) in RCA: 80] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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