1
|
Zhao Q, Møller KH, Chen J, Kjaergaard HG. Cost-Effective Implementation of Multiconformer Transition State Theory for Alkoxy Radical Unimolecular Reactions. J Phys Chem A 2022; 126:6483-6494. [PMID: 36053271 DOI: 10.1021/acs.jpca.2c04328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Alkoxy radicals are important intermediates in the gas-phase oxidation of volatile organic compounds (VOCs) determining the nature of the first-generation products. An accurate description of their chemistry under atmospheric conditions is essential for understanding the atmospheric oxidation of VOCs. Unfortunately, experimental measurements of the rate coefficients of unimolecular alkoxy radical reactions are scarce, especially for larger systems. As has previously been done for peroxy radical hydrogen shift reactions, we present a cost-effective approach to the practical implementation of multiconformer transition state theory (MC-TST) for alkoxy radical unimolecular (H-shift and decomposition) reactions. Specifically, we test the optimal approach for the conformational sampling as well as the best value for a cutoff of high-energy conformers. In order to obtain accurate rate coefficients at a reduced computational cost, an energy cutoff is employed to reduce the required number of high-level calculations. The rate coefficients obtained with the developed theoretical approach are compared to available experimental rate coefficients for both 1,5 H-shifts and decomposition reactions. For all but one of the reactions tested, the calculated MC-TST rate coefficients agree with experimental results to within a factor of 7. The discrepancy for the final reaction is about a factor of 15, but part of the discrepancy is caused by pressure effects, which are not included in MC-TST. Thus, for the fastest alkoxy reactions, deviation from the high-pressure limit even at 1 bar should be considered.
Collapse
Affiliation(s)
- Qian Zhao
- State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Shanxi, Xi'an710049, China.,Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100, Copenhagen Ø, Denmark
| | - Kristian H Møller
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100, Copenhagen Ø, Denmark
| | - Jing Chen
- 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
| |
Collapse
|
2
|
Thompson RS, Langlois GG, Sibener SJ. Oxidative Destruction of Multilayer Diisopropyl Methylphosphonate Films by O(3P) Atomic Oxygen. J Phys Chem B 2017; 122:455-463. [DOI: 10.1021/acs.jpcb.7b02589] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Rebecca S. Thompson
- The James Franck Institute
and Department of Chemistry, The University of Chicago, 929 East
57th Street, Chicago, Illinois 60637, United States
| | - Grant G. Langlois
- The James Franck Institute
and Department of Chemistry, The University of Chicago, 929 East
57th Street, Chicago, Illinois 60637, United States
| | - S. J. Sibener
- The James Franck Institute
and Department of Chemistry, The University of Chicago, 929 East
57th Street, Chicago, Illinois 60637, United States
| |
Collapse
|
3
|
McGillen MR, Tyndall GS, Orlando JJ, Pimentel AS, Medeiros DJ, Burkholder JB. Experimentally Determined Site-Specific Reactivity of the Gas-Phase OH and Cl + i-Butanol Reactions Between 251 and 340 K. J Phys Chem A 2016; 120:9968-9981. [PMID: 28002951 DOI: 10.1021/acs.jpca.6b09266] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Product branching ratios for the gas-phase reactions of i-butanol, (CH3)2CHCH2OH, with OH radicals (251, 294, and 340 K) and Cl atoms (294 K) were quantified in an environmental chamber study and used to interpret i-butanol site-specific reactivity. i-Butyraldehyde, acetone, acetaldehyde, and formaldehyde were observed as major stable end products in both reaction systems with carbon mass balance indistinguishable from unity. Product branching ratios for OH oxidation were found to be temperature-dependent with the α, β, and γ channels changing from 34 ± 6 to 47 ± 1%, from 58 ± 6 to 37 ± 9%, and from 8 ± 1 to 16 ± 4%, respectively, between 251 and 340 K. Recommended temperature-dependent site-specific modified Arrhenius expressions for the OH reaction rate coefficient are (cm3 molecule-1 s-1): kα(T) = 8.64 × 10-18 × T1.91exp(666/T); kβ(T) = 5.15 × 10-19 × T2.04exp(1304/T); kγ(T) = 3.20 × 10-17 × T1.78exp(107/T); kOH(T) = 2.10 × 10-18 × T2exp(-23/T), where kTotal(T) = kα(T) + kβ(T) + kγ(T) + kOH(T). The expressions were constrained using the product branching ratios measured in this study and previous total phenomenological rate coefficient measurements. The site-specific expressions compare reasonably well with recent theoretical work. It is shown that use of i-butanol would result in acetone as the dominant degradation product under most atmospheric conditions.
Collapse
Affiliation(s)
- Max R McGillen
- Chemical Sciences Division, Earth System Research Laboratory, National Oceanic and Atmospheric Administration , 325 Broadway, Boulder, Colorado 80305, United States.,Cooperative Institute for Research in Environmental Sciences, University of Colorado , Boulder, Colorado 80309, United States
| | - Geoffrey S Tyndall
- Atmospheric Chemistry Observations and Modeling Laboratory, National Center for Atmospheric Research , Boulder, Colorado 80307, United States
| | - John J Orlando
- Atmospheric Chemistry Observations and Modeling Laboratory, National Center for Atmospheric Research , Boulder, Colorado 80307, United States
| | - Andre S Pimentel
- Departamento de Química, Pontifícia Universidade Católica do Rio de Janeiro , Rio de Janeiro, Brazil
| | - Diogo J Medeiros
- Departamento de Química, Pontifícia Universidade Católica do Rio de Janeiro , Rio de Janeiro, Brazil
| | - James B Burkholder
- Chemical Sciences Division, Earth System Research Laboratory, National Oceanic and Atmospheric Administration , 325 Broadway, Boulder, Colorado 80305, United States
| |
Collapse
|
4
|
Dames EE, Green WH. The Effect of Alcohol and Carbonyl Functional Groups on the Competition between Unimolecular Decomposition and Isomerization in C4and C5Alkoxy Radicals. INT J CHEM KINET 2016. [DOI: 10.1002/kin.21015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Enoch E. Dames
- Department of Chemical Engineering; Massachusetts Institute of Technology; Cambridge MA 02139
| | - William H. Green
- Department of Chemical Engineering; Massachusetts Institute of Technology; Cambridge MA 02139
| |
Collapse
|
5
|
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
| |
Collapse
|
6
|
Raff JD, Finlayson-Pitts BJ. Hydroxyl radical quantum yields from isopropyl nitrite photolysis in air. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2010; 44:8150-8155. [PMID: 20879762 DOI: 10.1021/es102218d] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Alkyl nitrites photolyze in air to yield alkoxy radicals and NO which, through secondary reactions, generate OH radicals. This photochemistry is important in the atmosphere and in laboratory studies where nitrites are often used as a source of OH. The overall quantum yield for hydroxyl radical formation from irradiation of isopropyl nitrite (i-C(3)H(7)ONO) between 300 and 425 nm in 1 atm air at 296 ± 2 K is reported for the first time. The OH radical was scavenged by reaction with CF(3)CF═CF(2) and the formation of CF(3)CFO and CF(2)O monitored as a function of time using Fourier transform infrared spectrometry. The quantum yield was found to be 0.54 ± 0.07 (2σ) and is independent of whether or not NO was added (up to 3 × 10(14) molecules cm(-3)) prior to photolysis to increase NO concentrations above those due to the photolysis of the nitrite. Ultraviolet-visible and infrared cross sections of i-C(3)H(7)ONO are also reported. These data on the OH quantum yields as well as the UV-visible and infrared cross sections for isopropyl nitrite are critical for quantitatively interpreting the results of laboratory studies where i-C(3)H(7)ONO is employed as an OH source as well as for assessing the role of alkyl nitrites in the chemistry of the troposphere.
Collapse
Affiliation(s)
- Jonathan D Raff
- Department of Chemistry, University of California, Irvine, California 92697-2025, USA
| | | |
Collapse
|
7
|
Somnitz H. The contribution of tunnelling to the 1,5 H-shift isomerisation reaction of alkoxyl radicals. Phys Chem Chem Phys 2008; 10:965-73. [DOI: 10.1039/b711429j] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
8
|
Welz O, Striebel F, Olzmann M. On the thermal unimolecular decomposition of the cyclohexoxy radical—an experimental and theoretical study. Phys Chem Chem Phys 2008; 10:320-9. [DOI: 10.1039/b713286g] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
9
|
Hassouna M, Delbos E, Devolder P, Viskolcz B, Fittschen C. Rate and Equilibrium Constant of the Reaction of 1-Methylvinoxy Radicals with O2: CH3COCH2 + O2 ↔ CH3COCH2O2. J Phys Chem A 2006; 110:6667-72. [PMID: 16722681 DOI: 10.1021/jp0558270] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The reaction of 1-methylvinoxy radicals, CH3COCH2, with molecular oxygen has been investigated by experimental and theoretical methods as a function of temperature (291-520 K) and pressure (0.042-10 bar He). Experiments have been performed by laser photolysis coupled to a detection of 1-methylvinoxy radicals by laser-induced fluorescence LIF. The potential energy surface calculations were performed using ab inito molecular orbital theory at the G3MP2B3 and CBSQB3 level of theory based on the density function theory optimized geometries. Derived molecular properties of the characteristic points of the potential energy surface were used to describe the mechanism and kinetics of the reaction under investigation. At 295 K, no pressure dependence of the rate constant for the association reaction has been observed: k(1,298K) = (1.18 +/- 0.04) x 10(-12) cm3 s(-1). Biexponential decays have been observed in the temperature range 459-520 K and have been interpreted as an equilibrium reaction. The temperature-dependent equilibrium constants have been extracted from these decays and a standard reaction enthalpy of deltaH(r,298K) = -105.0 +/- 2.0 kJ mol(-1) and entropy of deltaS(r,298K) = -143.0 +/- 4.0 J mol(-1) K(-1) were derived, in excellent agreement with the theoretical results. Consistent heats of formation for the vinoxy and the 1-methylvinoxy radical as well as their O2 adducts are recommended based on our complementary experimental and theoretical study deltaH(f,298K) = 13.0 +/- 2.0, -32. 9+/- 2.0, -85.9 +/- 4.0, and -142.1 +/- 4.0 kJ mol(-1) for CH2CHO, CH3COCH2 radicals, and their adducts, respectively.
Collapse
Affiliation(s)
- Melynda Hassouna
- Physicochimie des Processus de Combustion et de l'Atmosphère UMR CNRS 8522 and Centré d'Etudes et Recherches Lasers et Applications, Université des Sciences et Technologies de Lille 1, 59655 Villeneuve d'Ascq Cedex, France
| | | | | | | | | |
Collapse
|
10
|
Curran HJ. Rate constant estimation for C1 to C4 alkyl and alkoxyl radical decomposition. INT J CHEM KINET 2006. [DOI: 10.1002/kin.20153] [Citation(s) in RCA: 181] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
11
|
Zhang L, Callahan KM, Derbyshire D, Dibble TS. Laser-Induced Fluorescence Spectra of 4-Methylcyclohexoxy Radical and Perdeuterated Cyclohexoxy Radical and Direct Kinetic Studies of Their Reactions with O2. J Phys Chem A 2005; 109:9232-40. [PMID: 16833263 DOI: 10.1021/jp051595t] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The laser-induced fluorescence (LIF) excitation spectra of the 4-methylcyclohexoxy and d11-cyclohexoxy radicals have been measured for the first time. LIF intensity was used as a probe in direct kinetic studies of the reaction of O(2) with trans-4-methylcyclohexoxy and d11-cyclohexoxy radicals from 228 to 301 K. Measured rate constants near room temperature are uniformly higher than the Arrhenius fit to the lower-temperature data, which can be explained by the regeneration of cyclic alkoxy radicals from the product of their beta-scission and the effect of O(2) concentration on the extent of regeneration. The Arrhenius expressions obtained over more limited ranges were k(O2) = (1.4(+8)(-1)) x 10(-13) exp[(-810 +/- 400)/T] cm(3) molecule(-1) s(-1) for trans-4-methylcyclohexoxy (228-292 K) and k(O2) = (3.7(+4)(-1)) x 10(-14) exp )[(-760 +/- 400) /T] cm(3) molecule(-1) s(-1) for d11-cyclohexoxy (228-267 K) independent of pressure in the range 50-90 Torr. The room-temperature rate constant for the reaction of trans-4-methylcyclohexoxy radical with O2 (obtained from the Arrhenius fit) is consistent with the commonly recommended value, but the observed activation energy is approximately 3 times larger than the recommended value of 0.4 kcal/mol and half the value previously found for the reaction of normal cyclohexoxy radical with O2.
Collapse
Affiliation(s)
- Lei Zhang
- Department of Chemistry, SUNY-Environmental Science and Forestry, 1 Forestry Drive, Syracuse, NY 13210, USA
| | | | | | | |
Collapse
|
12
|
Johnson D, Carr S, Cox RA. The kinetics of the gas-phase decomposition of the 2-methyl-2-butoxyl and 2-methyl-2-pentoxyl radicals. Phys Chem Chem Phys 2005; 7:2182-90. [PMID: 19791411 DOI: 10.1039/b501416f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The kinetics of the title reactions have been studied by relative-rate methods as a function of temperature. Relative-rate coefficients for the two decomposition channels of 2-methyl-2-butoxyl have been measured at five different temperatures between 283 and 345 K and the observed temperature dependence is consistent with the results of some previous experimental studies. The kinetics of the two decomposition channels of 2-methyl-2-pentoxyl have also been investigated, as a function of temperature, relative to the estimated rate of isomerisation of this radical. Room-temperature rate coefficient data for the two decomposition channels of both 2-methyl-2-pentoxyl and 2-methyl-2-butxoyl (after combining the relative rate coefficient for this latter with a value for the rate coefficient of the major channel, extrapolated from the data presented by Batt et al., Int. J. Chem. Kinet., 1978, 10, 931) are shown to be consistent with a non-linear kinetic correlation, for alkoxyl radical decomposition rate data, previously presented by this laboratory (Johnson et al., Atmos. Environ., 2004, 38, 1755-1765).
Collapse
Affiliation(s)
- David Johnson
- University Chemical Laboratory, Lensfield Road, Cambridge, UK CB2 1EW.
| | | | | |
Collapse
|
13
|
Cassanelli P, Johnson D, Anthony Cox R. A temperature-dependent relative-rate study of the OH initiated oxidation of n-butane: The kinetics of the reactions of the 1- and 2-butoxy radicals. Phys Chem Chem Phys 2005; 7:3702-10. [PMID: 16358017 DOI: 10.1039/b507137b] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The kinetics of the reactions of 1-and 2-butoxy radicals have been studied using a slow-flow photochemical reactor with GC-FID detection of reactants and products. Branching ratios between decomposition, CH3CH(O*)CH2CH3 --> CH3CHO + C2H5, reaction (7), and reaction with oxygen, CH3CH(O*)CH2CH3+ O2 --> CH3C(O)C2H5+ HO2, reaction (6), for the 2-butoxy radical and between isomerization, CH3CH2CH2CH2O* --> CH2CH2CH2CH2OH, reaction (9), and reaction with oxygen, CH3CH2CH2CH2O* + O2 --> C3H7CHO + HO2, reaction (8), for the 1-butoxy radical were measured as a function of oxygen concentration at atmospheric pressure over the temperature range 250-318 K. Evidence for the formation of a small fraction of chemically activated alkoxy radicals generated from the photolysis of alkyl nitrite precursors and from the exothermic reaction of 2-butyl peroxy radicals with NO was observed. The temperature dependence of the rate constant ratios for a thermalized system is given by k7/k6= 5.4 x 10(26) exp[(-47.4 +/- 2.8 kJ mol(-1))/RT] molecule cm(-3) and k9/k8= 1.98 x 10(23) exp[(-22.6 +/- 3.9 kJ mol(-1))/RT] molecule cm(-3). The results agree well with the available experimental literature data at ambient temperature but the temperature dependence of the rate constant ratios is weaker than in current recommendations.
Collapse
Affiliation(s)
- Paola Cassanelli
- University Chemical Laboratory, Lensfield Road, Cambridge, UKCB2 1EW.
| | | | | |
Collapse
|
14
|
Affiliation(s)
- Roger Atkinson
- Air Pollution Research Center and Department of Environmental Sciences, University of California, Riverside, CA 92521, USA.
| | | |
Collapse
|
15
|
Zhang L, Kitney KA, Ferenac MA, Deng W, Dibble TS. LIF Spectra of Cyclohexoxy Radical and Direct Kinetic Studies of Its Reaction with O2. J Phys Chem A 2003. [DOI: 10.1021/jp036891p] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Lei Zhang
- Department of Chemistry, SUNYEnvironmental Science and Forestry, 1 Forestry Drive, Syracuse, New York 13210
| | - Katherine A. Kitney
- Department of Chemistry, SUNYEnvironmental Science and Forestry, 1 Forestry Drive, Syracuse, New York 13210
| | - Melissa A. Ferenac
- Department of Chemistry, SUNYEnvironmental Science and Forestry, 1 Forestry Drive, Syracuse, New York 13210
| | - Wei Deng
- Department of Chemistry, SUNYEnvironmental Science and Forestry, 1 Forestry Drive, Syracuse, New York 13210
| | - Theodore S. Dibble
- Department of Chemistry, SUNYEnvironmental Science and Forestry, 1 Forestry Drive, Syracuse, New York 13210
| |
Collapse
|
16
|
Orlando JJ, Tyndall GS, Wallington TJ. The Atmospheric Chemistry of Alkoxy Radicals. Chem Rev 2003; 103:4657-90. [PMID: 14664628 DOI: 10.1021/cr020527p] [Citation(s) in RCA: 241] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- John J Orlando
- Atmospheric Chemistry Division, National Center for Atmospheric Research, P.O. Box 3000, Boulder, CO 80307-3000, USA.
| | | | | |
Collapse
|
17
|
Rauk A, Boyd RJ, Boyd SL, Henry DJ, Radom L. Alkoxy radicals in the gaseous phase: β-scission reactions and formation by radical addition to carbonyl compounds. CAN J CHEM 2003. [DOI: 10.1139/v02-206] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The structures and reactivities of the alkoxy radicals methoxy (CH3O·), ethoxy (CH3CH2O·), 1-propoxy (CH3CH2CH2O·), 2-propoxy ((CH3)2CHO·), 2-butoxy (CH3CH2CH(CH3)O·), tert-butoxy ((CH3)3CO·), prop-2-enoxy (CH2=CHCH2O·), and but-3-en-2-oxy (CH2=CHCH(CH3)O·) have been investigated at the B3-LYP/6-31G(d) and CBS-RAD levels of theory. Enthalpies of formation (ΔfH°298) were calculated with CBS-RAD for all the alkoxy radicals, the carbonyl and radical products of β-scission reactions, and the transition structures leading to them. The mean absolute deviation between the predicted and available experimental ΔfH°298 values is 5.4 kJ mol1. Eyring (ΔH0, ΔH298, ΔG298) and Arrhenius (log A, Ea) activation parameters for both the forward (β-scission) and reverse (radical addition to carbonyl) pathways were calculated. Agreement with available experimental data is very good, generally within 15 kJ mol1 for Ea, and 0.5 for log A. The transition structures are found to be substantially polarized, with the departing radical slightly positive, the O atom negative, and the rest of the molecule positive. The barriers for the β-scission reactions decrease with decreasing endothermicity and with decreasing ionization energy of the departing radical.Key words: alkoxy, alkoxyl, radical, addition, carbonyl, β-scission, calculaton, electronic structure, B3LYP, CBS-RAD, thermochemistry.
Collapse
|
18
|
Orlando JJ, Tyndall GS, Apel EC, Riemer DD, Paulson SE. Rate coefficients and mechanisms of the reaction of cl-atoms with a series of unsaturated hydrocarbons under atmospheric conditions. INT J CHEM KINET 2003. [DOI: 10.1002/kin.10135] [Citation(s) in RCA: 82] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
19
|
Bethel HL, Atkinson R, Arey J. Kinetics and products of the reactions of OH radicals with 2-methyl-2-pentanol and 4-methyl-2-pentanol. J Photochem Photobiol A Chem 2003. [DOI: 10.1016/s1010-6030(03)00059-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
20
|
Atmospheric fate of small alkoxy radicals: recent experimental and theoretical advances. J Photochem Photobiol A Chem 2003. [DOI: 10.1016/s1010-6030(03)00055-8] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
21
|
Méreau R, Rayez MT, Caralp F, Rayez JC. Isomerisation reactions of alkoxy radicals: theoretical study and structure–activity relationships. Phys Chem Chem Phys 2003. [DOI: 10.1039/b307708j] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
22
|
Henon E, Canneaux S, Bohr F, Dóbé S. Features of the potential energy surface for the reaction of OH radical with acetone. Phys Chem Chem Phys 2003. [DOI: 10.1039/b210247c] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
23
|
Ferenac MA, Davis AJ, Holloway AS, Dibble TS. Isomerization and Decomposition Reactions of Primary Alkoxy Radicals Derived from Oxygenated Solvents. J Phys Chem A 2002. [DOI: 10.1021/jp0262923] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Melissa A. Ferenac
- Department of Chemistry, State University of New YorkEnvironmental Science and Forestry, 1 Forestry Drive, Syracuse, New York 13210
| | - Andrew J. Davis
- Department of Chemistry, State University of New YorkEnvironmental Science and Forestry, 1 Forestry Drive, Syracuse, New York 13210
| | - Andrew S. Holloway
- Department of Chemistry, State University of New YorkEnvironmental Science and Forestry, 1 Forestry Drive, Syracuse, New York 13210
| | - Theodore S. Dibble
- Department of Chemistry, State University of New YorkEnvironmental Science and Forestry, 1 Forestry Drive, Syracuse, New York 13210
| |
Collapse
|
24
|
Rayez MT, Picquet-Varrault B, Caralp F, Rayez JC. CH3C(O)OCH(O˙)CH3alkoxy radical derived from ethyl acetate: Novel rearrangement confirmed by computational chemistry. Phys Chem Chem Phys 2002. [DOI: 10.1039/b207511n] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
25
|
Gomez N, Hénon E, Bohr F, Devolder P. Rate Constants for the Reactions of CH3O with Cyclohexane, Cyclohexene, and 1,4-Cyclohexadiene: Variable Temperature Experiments and Theoretical Comparison of Addition and H-Abstraction Channels. J Phys Chem A 2001. [DOI: 10.1021/jp010204h] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nathalie Gomez
- Laboratoire de Physico-chimie des Processus de Combustion, UMR CNRS 8522, Centre d'Etudes et de Recherches Lasers et Applications, Université des Sciences et Technologies de Lille, 59655 Villeneuve d'Ascq Cedex, France, and Groupe de Spectroscopie Moléculaire et Atmosphérique, Laboratoire de Chimie-physique, UMR CNRS 6089, Faculté des Sciences, Université de Reims ChampagneArdenne, Moulin de la Housse BP 1039, 51687 Reims Cedex 2, France
| | - Eric Hénon
- Laboratoire de Physico-chimie des Processus de Combustion, UMR CNRS 8522, Centre d'Etudes et de Recherches Lasers et Applications, Université des Sciences et Technologies de Lille, 59655 Villeneuve d'Ascq Cedex, France, and Groupe de Spectroscopie Moléculaire et Atmosphérique, Laboratoire de Chimie-physique, UMR CNRS 6089, Faculté des Sciences, Université de Reims ChampagneArdenne, Moulin de la Housse BP 1039, 51687 Reims Cedex 2, France
| | - Frédéric Bohr
- Laboratoire de Physico-chimie des Processus de Combustion, UMR CNRS 8522, Centre d'Etudes et de Recherches Lasers et Applications, Université des Sciences et Technologies de Lille, 59655 Villeneuve d'Ascq Cedex, France, and Groupe de Spectroscopie Moléculaire et Atmosphérique, Laboratoire de Chimie-physique, UMR CNRS 6089, Faculté des Sciences, Université de Reims ChampagneArdenne, Moulin de la Housse BP 1039, 51687 Reims Cedex 2, France
| | - Pascal Devolder
- Laboratoire de Physico-chimie des Processus de Combustion, UMR CNRS 8522, Centre d'Etudes et de Recherches Lasers et Applications, Université des Sciences et Technologies de Lille, 59655 Villeneuve d'Ascq Cedex, France, and Groupe de Spectroscopie Moléculaire et Atmosphérique, Laboratoire de Chimie-physique, UMR CNRS 6089, Faculté des Sciences, Université de Reims ChampagneArdenne, Moulin de la Housse BP 1039, 51687 Reims Cedex 2, France
| |
Collapse
|
26
|
Deng W, Davis AJ, Zhang L, Katz DR, Dibble TS. Direct Kinetic Studies of Reactions of 3-Pentoxy Radicals with NO and O2. J Phys Chem A 2001. [DOI: 10.1021/jp011875i] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Wei Deng
- Department of Chemistry, State University of New York, College of Environmental Science and Forestry, 1 Forestry Drive, Syracuse, New York 13210
| | - Andrew J. Davis
- Department of Chemistry, State University of New York, College of Environmental Science and Forestry, 1 Forestry Drive, Syracuse, New York 13210
| | - Lei Zhang
- Department of Chemistry, State University of New York, College of Environmental Science and Forestry, 1 Forestry Drive, Syracuse, New York 13210
| | - David R. Katz
- Department of Chemistry, State University of New York, College of Environmental Science and Forestry, 1 Forestry Drive, Syracuse, New York 13210
| | - Theodore S. Dibble
- Department of Chemistry, State University of New York, College of Environmental Science and Forestry, 1 Forestry Drive, Syracuse, New York 13210
| |
Collapse
|
27
|
|
28
|
Wang C, Deng W, Shemesh LG, Lilien MD, Katz DR, Dibble TS. Observation of Fluorescence Excitation Spectra of tert-Pentoxy and 3-Pentoxy Radicals. J Phys Chem A 2000. [DOI: 10.1021/jp000437t] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Chuji Wang
- Department of Chemistry, State University of New York, College of Environmental Science and Forestry, 1 Forestry Drive, Syracuse, New York 13210
| | - Wei Deng
- Department of Chemistry, State University of New York, College of Environmental Science and Forestry, 1 Forestry Drive, Syracuse, New York 13210
| | - Liat G. Shemesh
- Department of Chemistry, State University of New York, College of Environmental Science and Forestry, 1 Forestry Drive, Syracuse, New York 13210
| | - Michael D. Lilien
- Department of Chemistry, State University of New York, College of Environmental Science and Forestry, 1 Forestry Drive, Syracuse, New York 13210
| | - David R. Katz
- Department of Chemistry, State University of New York, College of Environmental Science and Forestry, 1 Forestry Drive, Syracuse, New York 13210
| | - Theodore S. Dibble
- Department of Chemistry, State University of New York, College of Environmental Science and Forestry, 1 Forestry Drive, Syracuse, New York 13210
| |
Collapse
|
29
|
Reznickova J, Hippler H, Striebel F, Tevzadze L. A Saturated LIF Study on the High Pressure Limiting Rate Constant of the Reaction CN + NO + M → NCNO + M between 200 and 600 K. Z PHYS CHEM 2000. [DOI: 10.1524/zpch.2000.214.8.1115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
The reaction CN + NO + M ↔ NCNO + M was studied in the bath gas helium at temperatures between 200 and 600 K and in the pressure range between 1 and 100 bar. CN radicals were generated by laser flash photolysis of BrCN at 193 nm in the presence of NO and high helium pressures. The concentration of CN radicals was detected by recording their non-resonant fluorescence yield at 420 nm after delayed excitation in the (0, 1)-band of the X
Collapse
|
30
|
Oguchi T, Miyoshi A, Koshi M, Matsui H. Direct Study on the Unimolecular Decomposition of Methoxy Radicals: The Role of the Tunneling Effect. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2000. [DOI: 10.1246/bcsj.73.53] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
31
|
Wang C, Shemesh LG, Deng W, Lilien MD, Dibble TS. Laser-Induced Fluorescence Excitation Spectra of tert-Butoxy and 2-Butoxy Radicals. J Phys Chem A 1999. [DOI: 10.1021/jp9918050] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Chuji Wang
- Department of Chemistry, College of Environmental Science and Forestry, State University of New York, 1 Forestry Drive, Syracuse, New York 13210
| | - Liat G. Shemesh
- Department of Chemistry, College of Environmental Science and Forestry, State University of New York, 1 Forestry Drive, Syracuse, New York 13210
| | - Wei Deng
- Department of Chemistry, College of Environmental Science and Forestry, State University of New York, 1 Forestry Drive, Syracuse, New York 13210
| | - Michael D. Lilien
- Department of Chemistry, College of Environmental Science and Forestry, State University of New York, 1 Forestry Drive, Syracuse, New York 13210
| | - Theodore S. Dibble
- Department of Chemistry, College of Environmental Science and Forestry, State University of New York, 1 Forestry Drive, Syracuse, New York 13210
| |
Collapse
|
32
|
Fittschen C, Frenzel A, Imrik K, Devolder P. Rate constants for the reactions of C2H5O, i-C3H7O, and n-C3H7O with NO and O2 as a function of temperature. INT J CHEM KINET 1999. [DOI: 10.1002/(sici)1097-4601(1999)31:12<860::aid-kin4>3.0.co;2-e] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|