251
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Theoretical studies on kinetics, mechanism and thermochemistry of gas-phase reactions of CF3CHFCF2OCF3 with OH radicals and Cl atoms and fate of alkoxy radical at 298K. J Fluor Chem 2014. [DOI: 10.1016/j.jfluchem.2014.08.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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252
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Baptista L, Fernandes Francisco L, Dias JF, da Silva EC, Ferreira dos Santos CV, Gil de Mendonça FS, Arbilla G. Theoretical study of Δ-3-(+)-carene oxidation. Phys Chem Chem Phys 2014; 16:19376-85. [PMID: 25102281 DOI: 10.1039/c4cp02627f] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work, the rate-limiting steps of Δ(3)-carene oxidation by ozone and OH radicals were studied. The thermochemical and kinetic parameters were evaluated using the B3LYP, PBE1PBE and BHandHLYP functionals, coupled cluster methods and the 6-311G(d,p) and 6-311++G(d,p) basis sets. The attack on the double bond may occur in different orientations, leading to different oxidation products. The rate coefficients of each step of the reactions were evaluated using conventional canonical transition-state theory and variational canonical transition-state theory whenever necessary. The theoretical rate coefficient for the ozonolysis mechanism, evaluated at the CCSD(T)/6-31G(d,p)//PBE1PBE/6-311++G(d,p) level, was 2.08 × 10(-17) cm(3) molecule(-1) s(-1). The coefficient for the oxidation initialised by the OH radical, calculated at the BHandHLYP/6-311++G(d,p) level, was 5.06 × 10(-12) cm(3) molecule(-1) s(-1). These values are in reasonable agreement with the experimental results. The importance of these reactions in atmospheric chemistry is discussed.
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Affiliation(s)
- Leonardo Baptista
- Universidade do Estado do Rio de Janeiro, Faculdade de Tecnologia, Departamento de Química e Ambiental, Rodovia Presidente Dutra Km 298, Resende, RJ, Brazil.
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253
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Liu F, Beames JM, Petit AS, McCoy AB, Lester MI. Infrared-driven unimolecular reaction of CH3CHOO Criegee intermediates to OH radical products. Science 2014; 345:1596-8. [DOI: 10.1126/science.1257158] [Citation(s) in RCA: 104] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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254
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Mishra BK. Theoretical investigation on the atmospheric fate of CF3C(O)OCH 2O radical: alpha-ester rearrangement vs oxidation at 298 K. J Mol Model 2014; 20:2444. [PMID: 25208556 DOI: 10.1007/s00894-014-2444-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2014] [Accepted: 08/26/2014] [Indexed: 11/25/2022]
Abstract
A theoretical study on the mechanism of the thermal decomposition of CF(3)C(O)OCH(2)O radical is presented for the first time. Geometry optimization and frequency calculations were performed at the MPWB1K/6-31 + G(d, p) level of theory and energetic information further refined by calculating the energy of the species using G2(MP2) theory. Three plausible decomposition pathways including α-ester rearrangement, reaction with O(2) and thermal decomposition (C-O bond scission) were considered in detail. Our results reveal that reaction with O(2) is the dominant path for the decomposition of CF(3)C(O)OCH(2)O radical in the atmosphere, involving the lowest energy barrier, which is in accord with experimental findings. Our theoretical results also suggest that α-ester rearrangement leading to the formation of trifluoroacetic acid TFA makes a negligible contribution to decomposition of the title alkoxy radical. The thermal rate constants for the above decomposition pathways were evaluated using canonical transition state theory (CTST) at 298 K.
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Affiliation(s)
- Bhupesh Kumar Mishra
- Department of Chemical Sciences, Tezpur University Tezpur, Tezpur, Assam, 784 028, India,
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255
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Li Y, Wang L. The atmospheric oxidation mechanism of 1,2,4-trimethylbenzene initiated by OH radicals. Phys Chem Chem Phys 2014; 16:17908-17. [DOI: 10.1039/c4cp02027h] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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256
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Li J, Carter S, Bowman JM, Dawes R, Xie D, Guo H. High-Level, First-Principles, Full-Dimensional Quantum Calculation of the Ro-vibrational Spectrum of the Simplest Criegee Intermediate (CH2OO). J Phys Chem Lett 2014; 5:2364-2369. [PMID: 26279560 DOI: 10.1021/jz501059m] [Citation(s) in RCA: 72] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The ro-vibrational spectrum of the simplest Criegee intermediate (CH2OO) has been determined quantum mechanically based on nine-dimensional potential energy and dipole surfaces for its ground electronic state. The potential energy surface is fitted to more than 50 000 high-level ab initio points with a root-mean-square error of 25 cm(-1), using a recently proposed permutation invariant polynomial neural network method. The calculated rotational constants, vibrational frequencies, and spectral intensities of CH2OO are in excellent agreement with experiment. The potential energy surface provides a valuable platform for studying highly excited vibrational and unimolecular reaction dynamics of this important molecule.
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Affiliation(s)
- Jun Li
- †Department of Chemistry and Chemical Biology, University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - Stuart Carter
- ‡Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Joel M Bowman
- ‡Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Richard Dawes
- §Department of Chemistry, Missouri University of Science and Technology, Rolla, Missouri 65409, United States
| | - Daiqian Xie
- ∥Institute of Theoretical and Computational Chemistry, Key Laboratory of Mesoscopic Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China
| | - Hua Guo
- †Department of Chemistry and Chemical Biology, University of New Mexico, Albuquerque, New Mexico 87131, United States
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257
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Begum S, Subramanian R. Reaction of chlorine radical with tetrahydrofuran: a theoretical investigation on mechanism and reactivity in gas phase. J Mol Model 2014; 20:2262. [PMID: 24867438 DOI: 10.1007/s00894-014-2262-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2014] [Accepted: 04/23/2014] [Indexed: 10/25/2022]
Abstract
Reaction of chlorine (Cl) radical with heterocyclic saturated ether, tetrahydrofuran has been studied. The detailed reactivity and mechanism of this reaction is analyzed using hybrid density functional theory (DFT), B3LYP and BB1K methods, and aug-cc-pVTZ basis set. To explore the mechanism of the reaction of tetrahydrofuran with Cl radical, four possible sites of hydrogen atom (H) abstraction pathways in tetrahydrofuran were analyzed. The barrier height and rate constants are calculated for the four H-abstraction channels. The BB1K calculated rate constant for α-axial H-abstraction is comparable with the experimentally determined rate constant. It reflects that α-axial H-abstraction is the main degradation pathway of tetrahydrofuran with Cl radical. DFT-based reactivity descriptors are also calculated and these values describe α-axial H-abstraction as the main reaction channel.
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Affiliation(s)
- Samiyara Begum
- Department of Chemistry, Indian Institute of Technology, Patna, India, 800013
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258
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Jain S, Zahardis J, Petrucci GA. Soft ionization chemical analysis of secondary organic aerosol from green leaf volatiles emitted by turf grass. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2014; 48:4835-43. [PMID: 24666343 DOI: 10.1021/es405355d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Globally, biogenic volatile organic compound (BVOC) emissions contribute 90% of the overall VOC emissions. Green leaf volatiles (GLVs) are an important component of plant-derived BVOCs, including cis-3-hexenylacetate (CHA) and cis-3-hexen-1-ol (HXL), which are emitted by cut grass. In this study we describe secondary organic aerosol (SOA) formation from the ozonolysis of dominant GLVs, their mixtures and grass clippings. Near-infrared laser desorption/ionization aerosol mass spectrometry (NIR-LDI-AMS) was used for chemical analysis of the aerosol. The chemical profile of SOA generated from grass clippings was correlated with that from chemical standards of CHA and HXL. We found that SOA derived from HXL most closely approximated SOA from turf grass, in spite of the approximately 5× lower emission rate of HXL as compared to CHA. Ozonolysis of HXL results in formation of low volatility, higher molecular weight compounds, such as oligomers, and formation of ester-type linkages. This is in contrast to CHA, where the hydroperoxide channel is the dominant oxidation pathway, as oligomer formation is inhibited by the acetate functionality.
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Affiliation(s)
- Shashank Jain
- University of Vermont , Department of Chemistry, 82 University Place, Burlington, Vermont 05405-0125, United States
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259
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Mishra BK, Lily M, Deka RC, Chandra AK. Theoretical investigation on gas-phase reaction of CF3CH2OCH3 with OH radicals and fate of alkoxy radicals (CF3CH(O•)OCH3/CF3CH2OCH2O•). J Mol Graph Model 2014; 50:90-9. [PMID: 24769690 DOI: 10.1016/j.jmgm.2014.03.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2014] [Revised: 03/25/2014] [Accepted: 03/27/2014] [Indexed: 11/15/2022]
Abstract
Detailed theoretical investigation has been performed on the mechanism, kinetics and thermochemistry of the gas phase reactions of CF3CH2OCH3 (HFE-263fb2) with OH radicals using ab-initio and DFT methods. Reaction profiles are modeled including the formation of pre-reactive and post-reactive complexes at entrance and exit channels, respectively. Our calculations reveal that hydrogen abstraction from the CH2 group is thermodynamically and kinetically more facile than that from the CH3 group. Using group-balanced isodesmic reactions, the standard enthalpies of formation for CF3CH2OCH3 and radicals (CF3CHOCH3 and CF3CH2OCH2) are also reported for the first time. The calculated bond dissociation energies for the CH bonds are in good agreement with experimental results. At 298K, the calculated total rate coefficient for CF3CH2OCH3+OH reactions is found to be in good agreement with the experimental results. The atmospheric fate of the alkoxy radicals, CF3CH(O)OCH3 and CF3CH2OCH2O are also investigated for the first time using the same level of theory. Out of three plausible decomposition channels, our results clearly point out that reaction with O2 is not the dominant path leading to the formation of CF3C(O)OCH3 for the decomposition of CF3CH(O)OCH3 radical in the atmosphere. This is in accord with the recent report of Osterstrom et al. [CPL 524 (2012) 32] but found to be in contradiction with experimental finding of Oyaro et al. [JPCA 109 (2005) 337].
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Affiliation(s)
| | - Makroni Lily
- Department of Chemistry, North-Eastern Hill University, Shillong 793022, India
| | - Ramesh Chandra Deka
- Department of Chemical Sciences, Tezpur University, Tezpur, Assam 784028, India.
| | - Asit K Chandra
- Department of Chemistry, North-Eastern Hill University, Shillong 793022, India.
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260
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Early time detection of OH radical products from energized Criegee intermediates CH2OO and CH3CHOO. Chem Phys Lett 2014. [DOI: 10.1016/j.cplett.2014.02.049] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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261
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Su YT, Lin HY, Putikam R, Matsui H, Lin MC, Lee YP. Extremely rapid self-reaction of the simplest Criegee intermediate CH2OO and its implications in atmospheric chemistry. Nat Chem 2014; 6:477-83. [PMID: 24848232 DOI: 10.1038/nchem.1890] [Citation(s) in RCA: 105] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2013] [Accepted: 02/11/2014] [Indexed: 12/19/2022]
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262
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A large source of low-volatility secondary organic aerosol. Nature 2014; 506:476-9. [PMID: 24572423 DOI: 10.1038/nature13032] [Citation(s) in RCA: 584] [Impact Index Per Article: 58.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2013] [Accepted: 01/14/2014] [Indexed: 02/01/2023]
Abstract
Forests emit large quantities of volatile organic compounds (VOCs) to the atmosphere. Their condensable oxidation products can form secondary organic aerosol, a significant and ubiquitous component of atmospheric aerosol, which is known to affect the Earth's radiation balance by scattering solar radiation and by acting as cloud condensation nuclei. The quantitative assessment of such climate effects remains hampered by a number of factors, including an incomplete understanding of how biogenic VOCs contribute to the formation of atmospheric secondary organic aerosol. The growth of newly formed particles from sizes of less than three nanometres up to the sizes of cloud condensation nuclei (about one hundred nanometres) in many continental ecosystems requires abundant, essentially non-volatile organic vapours, but the sources and compositions of such vapours remain unknown. Here we investigate the oxidation of VOCs, in particular the terpene α-pinene, under atmospherically relevant conditions in chamber experiments. We find that a direct pathway leads from several biogenic VOCs, such as monoterpenes, to the formation of large amounts of extremely low-volatility vapours. These vapours form at significant mass yield in the gas phase and condense irreversibly onto aerosol surfaces to produce secondary organic aerosol, helping to explain the discrepancy between the observed atmospheric burden of secondary organic aerosol and that reported by many model studies. We further demonstrate how these low-volatility vapours can enhance, or even dominate, the formation and growth of aerosol particles over forested regions, providing a missing link between biogenic VOCs and their conversion to aerosol particles. Our findings could help to improve assessments of biosphere-aerosol-climate feedback mechanisms, and the air quality and climate effects of biogenic emissions generally.
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263
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Liu F, Beames JM, Green AM, Lester MI. UV spectroscopic characterization of dimethyl- and ethyl-substituted carbonyl oxides. J Phys Chem A 2014; 118:2298-306. [PMID: 24621008 DOI: 10.1021/jp412726z] [Citation(s) in RCA: 83] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Dimethyl- and ethyl-substituted Criegee intermediates, (CH3)2COO and CH3CH2CHOO, are photolytically generated from diiodo precursors, detected by VUV photoionization at 118 nm, and spectroscopically characterized via UV-induced depletion of the m/z = 74 signals under jet-cooled conditions. In each case, UV excitation resonant with the B-X transition results in significant ground-state depletion, reflecting the large absorption cross section and rapid dynamics in the excited B state. The broad UV absorption spectra of both (CH3)2COO and CH3CH2CHOO peak at ~320 nm with absorption cross sections approaching ~4 × 10(-17) cm(2) molec(-1). The UV absorption spectra for (CH3)2COO and CH3CH2CHOO are similar to that reported previously for syn-CH3CHOO, suggesting analogous intramolecular interactions between the α-H and terminal O of the COO groups. Hydroxyl radical products generated concurrently with the Criegee intermediates are detected by 1 + 1' resonance enhanced multiphoton ionization. The OH signals, scaled relative to those for the Criegee intermediates, are compared with prior studies of OH yield from alkene ozonolysis. The stationary points along the reaction coordinates from the alkyl-substituted Criegee intermediates to vinyl hydroperoxides and OH products are also computed to provide insight on the OH yields.
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Affiliation(s)
- Fang Liu
- Department of Chemistry, University of Pennsylvania , Philadelphia, Pennsylvania 19104-6323, United States
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264
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Buras ZJ, Elsamra RMI, Jalan A, Middaugh JE, Green WH. Direct Kinetic Measurements of Reactions between the Simplest Criegee Intermediate CH2OO and Alkenes. J Phys Chem A 2014; 118:1997-2006. [DOI: 10.1021/jp4118985] [Citation(s) in RCA: 74] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Zachary J. Buras
- Department
of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts
Avenue, Cambridge, Massachusetts 02139, United States
| | - Rehab M. I. Elsamra
- Department
of Chemistry, Faculty of Science, Alexandria University, Ibrahimia, 21321, Alexandria, Egypt
| | - Amrit Jalan
- Department
of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts
Avenue, Cambridge, Massachusetts 02139, United States
| | - Joshua E. Middaugh
- Department
of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts
Avenue, Cambridge, Massachusetts 02139, United States
| | - William H. Green
- Department
of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts
Avenue, Cambridge, Massachusetts 02139, United States
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265
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Kumar M, Busch DH, Subramaniam B, Thompson WH. Criegee Intermediate Reaction with CO: Mechanism, Barriers, Conformer-Dependence, and Implications for Ozonolysis Chemistry. J Phys Chem A 2014; 118:1887-94. [DOI: 10.1021/jp500258h] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Manoj Kumar
- Department
of Chemistry, University of Kansas, Lawrence, Kansas 66045, United States
- Center for Environmentally Beneficial Catalysis, 1501 Wakarusa Drive, Lawrence, Kansas 66047, United States
| | - Daryle H. Busch
- Department
of Chemistry, University of Kansas, Lawrence, Kansas 66045, United States
- Center for Environmentally Beneficial Catalysis, 1501 Wakarusa Drive, Lawrence, Kansas 66047, United States
| | - Bala Subramaniam
- Center for Environmentally Beneficial Catalysis, 1501 Wakarusa Drive, Lawrence, Kansas 66047, United States
- Department
of Chemical and Petroleum Engineering, University of Kansas, Lawrence, Kansas 66045, United States
| | - Ward H. Thompson
- Department
of Chemistry, University of Kansas, Lawrence, Kansas 66045, United States
- Center for Environmentally Beneficial Catalysis, 1501 Wakarusa Drive, Lawrence, Kansas 66047, United States
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266
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Liu Y, Bayes KD, Sander SP. Measuring rate constants for reactions of the simplest Criegee intermediate (CH2OO) by monitoring the OH radical. J Phys Chem A 2014; 118:741-7. [PMID: 24400595 DOI: 10.1021/jp407058b] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
While generating the CH2OO molecule by reacting CH2I with O2, significant amounts of the OH radical were observed by laser-induced fluorescence. At least two different processes formed OH. A fast process was probably initiated by a reaction of vibrationally hot CH2I radicals. The second process appeared to be associated with the decay of the CH2OO molecule. The addition of molecules known to react with CH2OO increased the observed decay rates of the OH signal. Using the OH signals as a proxy for the CH2OO concentration, the rate constant for the reaction of hexafluoroacetone with CH2OO was determined to be (3.33 ± 0.27) × 10(-11) cm(3) molecule(-1) s(-1), in good agreement with the value measured by Taatjes et al.1 The rate constant for the reaction of SO2 with CH2OO, (3.53 ± 0.29) × 10(-11) cm(3) molecule(-1) s(-1), showed no pressure dependence over the range of 50-200 Torr and was in agreement with the value at 4 Torr reported by Welz et al.
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Affiliation(s)
- Yingdi Liu
- Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, California 91109-8099, United States
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267
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Lin XX, Liu YR, Huang T, Xu KM, Zhang Y, Jiang S, Gai YB, Zhang WJ, Huang W. Theoretical studies of the hydration reactions of stabilized Criegee intermediates from the ozonolysis of β-pinene. RSC Adv 2014. [DOI: 10.1039/c4ra04172k] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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268
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Taatjes CA, Shallcross DE, Percival CJ. Research frontiers in the chemistry of Criegee intermediates and tropospheric ozonolysis. Phys Chem Chem Phys 2014; 16:1704-18. [DOI: 10.1039/c3cp52842a] [Citation(s) in RCA: 214] [Impact Index Per Article: 21.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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269
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Novelli A, Vereecken L, Lelieveld J, Harder H. Direct observation of OH formation from stabilised Criegee intermediates. Phys Chem Chem Phys 2014; 16:19941-51. [DOI: 10.1039/c4cp02719a] [Citation(s) in RCA: 97] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The first direct observation of OH radicals from syn-CH3CHOO Criegee intermediates decomposition suggests it affects tropospheric chemistry and ambient OH measurements.
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Affiliation(s)
- A. Novelli
- Atmospheric Chemistry Dept
- Max Planck Institute for Chemistry
- 55128 Mainz, Germany
| | - L. Vereecken
- Atmospheric Chemistry Dept
- Max Planck Institute for Chemistry
- 55128 Mainz, Germany
| | - J. Lelieveld
- Atmospheric Chemistry Dept
- Max Planck Institute for Chemistry
- 55128 Mainz, Germany
| | - H. Harder
- Atmospheric Chemistry Dept
- Max Planck Institute for Chemistry
- 55128 Mainz, Germany
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270
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Mishra BK. Theoretical investigation on the atmospheric fate of the CF3C(O)OCH(O)CF3 radical: alpha-ester rearrangement vs. oxidation. RSC Adv 2014. [DOI: 10.1039/c4ra00881b] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
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271
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272
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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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273
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Kumar M, Busch DH, Subramaniam B, Thompson WH. Barrierless tautomerization of Criegee intermediates via acid catalysis. Phys Chem Chem Phys 2014; 16:22968-73. [DOI: 10.1039/c4cp03065f] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Electronic structure calculations indicate that the organic acids catalyze the tautomerization of Criegee intermediates via a 1,4 β-hydrogen atom transfer to yield a vinyl hydroperoxide to such an extent that it becomes a barrierless process.
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Affiliation(s)
- Manoj Kumar
- Department of Chemistry
- University of Kansas
- Lawrence 66045, USA
- Center for Environmentally Beneficial Catalysis
- 1501 Wakarusa Drive
| | - Daryle H. Busch
- Department of Chemistry
- University of Kansas
- Lawrence 66045, USA
- Center for Environmentally Beneficial Catalysis
- 1501 Wakarusa Drive
| | - Bala Subramaniam
- Center for Environmentally Beneficial Catalysis
- 1501 Wakarusa Drive
- Lawrence, USA
- Department of Chemical and Petroleum Engineering
- University of Kansas
| | - Ward H. Thompson
- Department of Chemistry
- University of Kansas
- Lawrence 66045, USA
- Center for Environmentally Beneficial Catalysis
- 1501 Wakarusa Drive
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274
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Vereecken L, Harder H, Novelli A. The reactions of Criegee intermediates with alkenes, ozone, and carbonyl oxides. Phys Chem Chem Phys 2014; 16:4039-49. [DOI: 10.1039/c3cp54514h] [Citation(s) in RCA: 129] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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275
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Sheps L, Scully AM, Au K. UV absorption probing of the conformer-dependent reactivity of a Criegee intermediate CH3CHOO. Phys Chem Chem Phys 2014; 16:26701-6. [DOI: 10.1039/c4cp04408h] [Citation(s) in RCA: 126] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Transient absorption probing of a Criegee intermediate acetaldehyde oxide reveals the UV spectra of the two possible conformers, syn- and anti-CH3CHOO, and enables direct measurements of conformer-dependent reactivity.
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Affiliation(s)
- Leonid Sheps
- Combustion Research Facility MS 9055
- Sandia National Laboratories
- Livermore, USA
| | | | - Kendrew Au
- Combustion Research Facility MS 9055
- Sandia National Laboratories
- Livermore, USA
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276
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Rudshteyn B, Castillo A, Ghogare AA, Liebman JF, Greer A. Theoretical study of the reaction formalhydrazone with singlet oxygen. Fragmentation of the C=N bond, ene reaction and other processes. Photochem Photobiol 2013; 90:431-8. [PMID: 24354600 DOI: 10.1111/php.12199] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2013] [Accepted: 10/21/2013] [Indexed: 01/03/2023]
Abstract
Photobiologic and synthetic versatility of hydrazones has not yet been established with (1)O2 as a route to commonly encountered nitrosamines. Thus, to determine whether the "parent" reaction of formalhydrazone and (1)O2 leads to facile C=N bond cleavage and resulting nitrosamine formation, we have carried out CCSD(T)//DFT calculations and analyzed the energetics of the oxidation pathways. A [2 + 2] pathway occurs via diradicals and formation of 3-amino-1,2,3-dioxazetidine in a 16 kcal/mol(-1) process. Reversible addition or physical quenching of (1)O2 occurs either on the formalhydrazone carbon for triplet diradicals at 2-3 kcal mol(-1), or on the nitrogen (N(3)) atom forming zwitterions at ~15 kcal/mol(-1), although the quenching channel by charge-transfer interaction was not computed. The computations also predict a facile conversion of formalhydrazone and (1)O2 to hydroperoxymethyl diazene in a low-barrier 'ene' process, but no 2-amino-oxaziridine-O-oxide (perepoxide-like) intermediate was found. A Benson-like analysis (group increment calculations) on the closed-shell species are in accord with the quantum chemical results.
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Affiliation(s)
- Benjamin Rudshteyn
- Department of Chemistry, Graduate Center & The City University of New York (CUNY), Brooklyn College, Brooklyn, NY
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277
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Rypkema HA, Francisco JS. Atmospheric Oxidation of Peroxyacetic Acid. J Phys Chem A 2013; 117:14151-62. [DOI: 10.1021/jp409773j] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Heather A. Rypkema
- Department of Chemistry and Department of Earth, Atmospheric, and Planetary
Sciences, Purdue University, West Lafayette, Indiana 47907, United States
| | - Joseph S. Francisco
- Department of Chemistry and Department of Earth, Atmospheric, and Planetary
Sciences, Purdue University, West Lafayette, Indiana 47907, United States
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278
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Karton A, Kettner M, Wild D. Sneaking up on the Criegee intermediate from below: Predicted photoelectron spectrum of the CH2OO− anion and W3-F12 electron affinity of CH2OO. Chem Phys Lett 2013. [DOI: 10.1016/j.cplett.2013.08.075] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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279
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Nakajima M, Endo Y. Communication: Determination of the molecular structure of the simplest Criegee intermediate CH2OO. J Chem Phys 2013; 139:101103. [DOI: 10.1063/1.4821165] [Citation(s) in RCA: 118] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
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280
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Farnia S, Vahedpour M, Abedi M, Farrokhpour H. Theoretical study on the mechanism and kinetics of acetaldehyde and hydroperoxyl radical: An important atmospheric reaction. Chem Phys Lett 2013. [DOI: 10.1016/j.cplett.2013.07.065] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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281
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Lesar A. Mechanistic study on the reaction of the CH2ClO2 radical with NO. Chem Phys Lett 2013. [DOI: 10.1016/j.cplett.2013.06.031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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282
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Long B, Tan XF, Chang CR, Zhao WX, Long ZW, Ren DS, Zhang WJ. Theoretical Studies on Gas-Phase Reactions of Sulfuric Acid Catalyzed Hydrolysis of Formaldehyde and Formaldehyde with Sulfuric Acid and H2SO4···H2O Complex. J Phys Chem A 2013; 117:5106-16. [DOI: 10.1021/jp312844z] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bo Long
- Key Laboratory of Atmospheric
Composition and Optical Radiation, Anhui Institute of Optics and Fine
Mechanics, Chinese Academy of Sciences,
Hefei 230031, China
- College
of Information Engineering, Guizhou Minzu University, Guiyang 550025, China
| | - Xing-Feng Tan
- College
of Information Engineering, Guizhou Minzu University, Guiyang 550025, China
| | - Chun-Ran Chang
- School of Chemical Engineering
and Technology, Xi’an Jiaotong University, Xi’an 710049, China
| | - Wei-Xiong Zhao
- Laboratory of Atmospheric Physico-Chemistry,
Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China
| | - Zheng-Wen Long
- Laboratory for Photoelectric Technology
and Application, College of Science, Guizhou University, Guiyang 550025, China
| | - Da-Sen Ren
- College
of Information Engineering, Guizhou Minzu University, Guiyang 550025, China
| | - Wei-Jun Zhang
- Key Laboratory of Atmospheric
Composition and Optical Radiation, Anhui Institute of Optics and Fine
Mechanics, Chinese Academy of Sciences,
Hefei 230031, China
- Laboratory of Atmospheric Physico-Chemistry,
Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China
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283
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Affiliation(s)
- Luc Vereecken
- Max Planck Institute for Chemistry, 55128 Mainz, Germany
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284
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Su YT, Huang YH, Witek HA, Lee YP. Infrared Absorption Spectrum of the Simplest Criegee Intermediate CH
2
OO. Science 2013; 340:174-6. [DOI: 10.1126/science.1234369] [Citation(s) in RCA: 223] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Affiliation(s)
- Yu-Te Su
- Department of Applied Chemistry and Institute of Molecular Science, National Chiao Tung University, 1001, Ta-Hsueh Road, Hsinchu 30010, Taiwan
| | - Yu-Hsuan Huang
- Department of Applied Chemistry and Institute of Molecular Science, National Chiao Tung University, 1001, Ta-Hsueh Road, Hsinchu 30010, Taiwan
| | - Henryk A. Witek
- Department of Applied Chemistry and Institute of Molecular Science, National Chiao Tung University, 1001, Ta-Hsueh Road, Hsinchu 30010, Taiwan
| | - Yuan-Pern Lee
- Department of Applied Chemistry and Institute of Molecular Science, National Chiao Tung University, 1001, Ta-Hsueh Road, Hsinchu 30010, Taiwan
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan
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285
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Taatjes CA, Welz O, Eskola AJ, Savee JD, Scheer AM, Shallcross DE, Rotavera B, Lee EPF, Dyke JM, Mok DKW, Osborn DL, Percival CJ. Direct Measurements of Conformer-Dependent Reactivity of the Criegee Intermediate CH3CHOO. Science 2013; 340:177-80. [DOI: 10.1126/science.1234689] [Citation(s) in RCA: 327] [Impact Index Per Article: 29.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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286
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Anglada JM, Olivella S, Solé A. The reaction of formaldehyde carbonyl oxide with the methyl peroxy radical and its relevance in the chemistry of the atmosphere. Phys Chem Chem Phys 2013; 15:18921-33. [DOI: 10.1039/c3cp53100g] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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287
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Ouyang B, McLeod MW, Jones RL, Bloss WJ. NO3 radical production from the reaction between the Criegee intermediate CH2OO and NO2. Phys Chem Chem Phys 2013; 15:17070-5. [DOI: 10.1039/c3cp53024h] [Citation(s) in RCA: 99] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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288
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Jalan A, Allen JW, Green WH. Chemically activated formation of organic acids in reactions of the Criegee intermediate with aldehydes and ketones. Phys Chem Chem Phys 2013; 15:16841-52. [DOI: 10.1039/c3cp52598h] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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289
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Vereecken L, Harder H, Novelli A. The reaction of Criegee intermediates with NO, RO2, and SO2, and their fate in the atmosphere. Phys Chem Chem Phys 2012; 14:14682-95. [PMID: 23032271 DOI: 10.1039/c2cp42300f] [Citation(s) in RCA: 196] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The reaction of Criegee intermediates (CI) with NO and RO(2) radicals is studied for the first time by theoretical methodologies; additionally, the reaction of CI with SO(2) molecules is re-examined. The reaction of CI with NO was found to be slow, with a distinct energy barrier. Their reaction with RO(2) radicals proceeds by the formation of a pre-reactive complex followed by addition of the RO(2) radical on the CI carbon over a submerged barrier, leading to a larger peroxy radical and opening the possibility for oligomer formation in agreement with experiment. The impact of singlet biradicals on the reaction of CI with SO(2) is examined, finding a different reaction mechanism compared to earlier work. For larger CI, the reaction with SO(2) at atmospheric pressures mainly yields thermalized sulfur-bearing secondary ozonides. The fate of the CI in the atmosphere is examined in detail, based on observed concentration of a multitude of coreactants in the atmosphere, and estimated rate coefficients available from literature data. The impact of SCI on tropospheric chemistry is discussed.
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Affiliation(s)
- L Vereecken
- Max Planck Institute for Chemistry, Mainz, Germany.
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