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Aswathi J, Janardanan D. Generation of 3-aminopropanamide and its cluster formation with nucleation precursors- a theoretical exploration. CHEMOSPHERE 2024; 354:141630. [PMID: 38462185 DOI: 10.1016/j.chemosphere.2024.141630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2023] [Revised: 02/05/2024] [Accepted: 03/01/2024] [Indexed: 03/12/2024]
Abstract
Aminoamides are formed in the atmospheric environments by the auto-oxidation of the parent diamines. In this work, the oxidation chemistry of diamine (1,3-Diaminopropane, Dap) to the amino amide (3- aminopropanamide, 3-APA) and its new particle formation potential with small atmospheric molecules such as NH3 (A), H2O (W) and H2SO4 (SA) are theoretically investigated using the M062X/6-311++G** theory. The bimolecular rate coefficient of the ·OH initiated H-atom abstraction is computed to be 1.01 × 10-11 cm3 molecule-1 s-1. Further reaction of the peroxy radical intermediate indicates that the pathway involving γ H- shift of the initially formed radical intermediates to be more favourable on kinetic grounds with the effective bimolecular rate coefficient of 3.87 × 10-14 cm3 molecule-1s-1. The thermodynamic barrier associated with the H-shifts involved in this pathway is in the range of 13-20 kcal/mol. The cluster formation of APA with SA is more favourable than the clusters with W and A, wherein the free energy of formation of (APA)(SA) and (APA)(SA)2 are -11.3 and -22.6 kcal/mol, respectively. However, the feasibility of cluster formation with W and A increases with the altitude and becomes spontaneous in the case of water at an altitude of 12 km. The present work indicates that aminoamides like 3-APA can participate in the initial stages of new particle formation events by forming clusters with SA molecules. The scattering parameters and topological analysis of different (Amide)(SA) clusters indicate more scattering properties for the (APA)(SA) cluster, which has an adverse effect on the atmosphere. Furthermore, topological analysis indicates that H-bond formation is more prominent in the (APA)(SA) cluster.
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Affiliation(s)
- J Aswathi
- Computational Chemistry Laboratory, Department of Chemistry, School of Physical Sciences, Central University of Kerala, Kasaragod, Kerala, 671320, India
| | - Deepa Janardanan
- Computational Chemistry Laboratory, Department of Chemistry, School of Physical Sciences, Central University of Kerala, Kasaragod, Kerala, 671320, India.
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Tayum N, Murugan A, Deka RC, Gour NK, Mishra BK. The molecular level study of the fate of the CH 3CH 2C(O)OCH(O)CH 3 radical derived from ethyl propionate. MOLECULAR SIMULATION 2023. [DOI: 10.1080/08927022.2023.2189975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/31/2023]
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3
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Li MY, Bai FY, Pan XM. Theoretical study of H-atom abstraction reactions from CH3CH2OCH2CH3, CHF2CF2OCH2CF3 and CF3CH2OCH3 by NO3 radical & subsequent degradation. J Mol Graph Model 2019; 93:107453. [DOI: 10.1016/j.jmgm.2019.107453] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Revised: 09/14/2019] [Accepted: 09/16/2019] [Indexed: 11/28/2022]
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4
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Viegas LP. Exploring the Reactivity of Hydrofluoropolyethers toward OH through a Cost-Effective Protocol for Calculating Multiconformer Transition State Theory Rate Constants. J Phys Chem A 2018; 122:9721-9732. [DOI: 10.1021/acs.jpca.8b08970] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Luís P. Viegas
- Aarhus Institute of Advanced Studies, Aarhus University, Høegh-Guldbergs Gade 6B, Buildings 1630-1632, Aarhus 8000, Denmark
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5
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Ye JT, Bai FY, Pan XM. Computational study of H-abstraction reactions from CH 3OCH 2CH 2Cl/CH 3CH 2OCH 2CH 2Cl by Cl atom and OH radical and fate of alkoxy radicals. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:23467-23484. [PMID: 27614635 DOI: 10.1007/s11356-016-7505-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2016] [Accepted: 08/22/2016] [Indexed: 06/06/2023]
Abstract
UNLABELLED Multichannel gas-phase reactions of CH3OCH2CH2Cl/CH3CH2OCH2CH2Cl with chlorine atom and hydroxyl radical have been investigated using ab initio method and canonical variational transition-state dynamic computations with the small-curvature tunneling correction. Further energetic information is refined by the coupled-cluster calculations with single and double excitations (CCSD)(T) method. Both hydrogen abstraction and displacement processes are carried out at the same level. Our results reveal that H-abstraction from the -OCH2- group is the dominant channel for CH3OCH2CH2Cl by OH radical or Cl atom, and from α-CH2 of the group CH3CH2- is predominate for the reaction CH3CH2OCH2CH2Cl with Cl/OH. The contribution of displacement processes may be unimportant due to the high barriers. The values of the calculated rate constants reproduce remarkably well the available experiment data. Standard enthalpies of formation for reactants and product radicals are calculated by isodesmic reactions. The Arrhenius expressions are given within 220-1200 K. The atmospheric lifetime, ozone depleting potential (ODP), ozone formation potential (OFP), and global warming potential (GWP) of CH3OCH2CH2Cl/CH3CH2OCH2CH2Cl are investigated. Meanwhile, the atmospheric fate of the alkoxy radicals are also researched using the same level of theory. To shed light on the atmospheric degradation, a mechanistic study is obtained, which indicates that reaction with O2 is the dominant path for the decomposition of CH3OCH(O•)CH2Cl, the C-C bond scission reaction is the primary reaction path in the consumption of CH3CH(O•)OCH2CH2Cl in the atmosphere. HIGHLIGHTS Ab initio method and canonical variational transition-state theory are employed to study the kinetic nature of hydrogen abstraction reactions of CH3OCH2CH2Cl/CH3CH2OCH2CH2Cl with Cl atom and OH radical and fate of alkoxy radicals (CH3OCH(O•)CH2Cl/CH3CH(O•)OCH2CH2Cl).
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Affiliation(s)
- Jin-Ting Ye
- Faculty of Chemistry, Institute of Functional Material Chemistry, Northeast Normal University, 130024, Changchun, People's Republic of China
| | - Feng-Yang Bai
- Faculty of Chemistry, Institute of Functional Material Chemistry, Northeast Normal University, 130024, Changchun, People's Republic of China
| | - Xiu-Mei Pan
- Faculty of Chemistry, Institute of Functional Material Chemistry, Northeast Normal University, 130024, Changchun, People's Republic of China.
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Bai FY, Wang X, Sun YQ, Wang RS, Pan XM. Atmospheric chemistry of ethers, esters, and alcohols on the lifetimes, temperature dependence, and kinetic isotope effect: an example of CF3CX2CX2CX2OX with OX reactions (X = H, D). RSC Adv 2016. [DOI: 10.1039/c6ra04902h] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Mechanisms and kinetics of the reaction of CF3CX2CX2CX2OX with OX (X= H, D) radical are investigated on a sound theoretical basis.
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Affiliation(s)
- Feng-Yang Bai
- Institute of Functional Material Chemistry
- Faculty of Chemistry
- Northeast Normal University
- Changchun
- People's Republic of China
| | - Xu Wang
- Institute of Functional Material Chemistry
- Faculty of Chemistry
- Northeast Normal University
- Changchun
- People's Republic of China
| | - Yan-Qiu Sun
- Institute of Functional Material Chemistry
- Faculty of Chemistry
- Northeast Normal University
- Changchun
- People's Republic of China
| | - Rong-Shun Wang
- Institute of Functional Material Chemistry
- Faculty of Chemistry
- Northeast Normal University
- Changchun
- People's Republic of China
| | - Xiu-Mei Pan
- Institute of Functional Material Chemistry
- Faculty of Chemistry
- Northeast Normal University
- Changchun
- People's Republic of China
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Gibilisco RG, Uranga JG, Santiago AN, Teruel MA. Atmospheric Degradation of CH2═C(CH3)C(O)OCH3 Initiated by OH Radicals: Mechanistic Study and Quantification of CH3C(O)C(O)OCH3 in NOx Free Air. J Phys Chem A 2015. [DOI: 10.1021/acs.jpca.5b04273] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rodrigo G. Gibilisco
- Dpto. de Fisicoquímica, Facultad de Ciencias Químicas and ‡Dpto. de Química
Orgánica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Instituto de Investigaciones en Fisicoquímica de Córdoba (INFIQC), Ciudad Universitaria, 5000 Córdoba, Argentina
| | - Jorge G. Uranga
- Dpto. de Fisicoquímica, Facultad de Ciencias Químicas and ‡Dpto. de Química
Orgánica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Instituto de Investigaciones en Fisicoquímica de Córdoba (INFIQC), Ciudad Universitaria, 5000 Córdoba, Argentina
| | - Ana N. Santiago
- Dpto. de Fisicoquímica, Facultad de Ciencias Químicas and ‡Dpto. de Química
Orgánica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Instituto de Investigaciones en Fisicoquímica de Córdoba (INFIQC), Ciudad Universitaria, 5000 Córdoba, Argentina
| | - Mariano A. Teruel
- Dpto. de Fisicoquímica, Facultad de Ciencias Químicas and ‡Dpto. de Química
Orgánica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Instituto de Investigaciones en Fisicoquímica de Córdoba (INFIQC), Ciudad Universitaria, 5000 Córdoba, Argentina
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Bhattacharjee D, Mishra BK, Deka RC. Theoretical insight on atmospheric chemistry of HFE-365mcf3: reactions with OH radicals, atmospheric lifetime, and fate of alkoxy radicals (CF3CF2CH(O•)OCH3/CF3CF2CH2OCH2O•). J Mol Model 2015; 21:69. [DOI: 10.1007/s00894-015-2629-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2014] [Accepted: 02/15/2015] [Indexed: 11/28/2022]
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Bai FY, Sun G, Wang X, Sun YQ, Wang RS, Pan XM. Theoretical Study on the Reactions of (CF3)2CFOCH3 + OH/Cl and Reaction of (CF3)2CFOCHO with Cl Atom. J Phys Chem A 2015; 119:1256-66. [DOI: 10.1021/jp5125553] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Feng-Yang Bai
- Institute
of Functional Material Chemistry, Faculty of Chemistry, Northeast Normal University, 130024 Changchun, People’s Republic of China
| | - Gang Sun
- Department
of Chemistry and Biology, Bei Hua University, 132013 Jilin, People’s Republic of China
| | - Xu Wang
- Institute
of Functional Material Chemistry, Faculty of Chemistry, Northeast Normal University, 130024 Changchun, People’s Republic of China
| | - Yan-Qiu Sun
- Institute
of Functional Material Chemistry, Faculty of Chemistry, Northeast Normal University, 130024 Changchun, People’s Republic of China
| | - Rong-Shun Wang
- Institute
of Functional Material Chemistry, Faculty of Chemistry, Northeast Normal University, 130024 Changchun, People’s Republic of China
| | - Xiu-Mei Pan
- Institute
of Functional Material Chemistry, Faculty of Chemistry, Northeast Normal University, 130024 Changchun, People’s Republic of China
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Wang L, Zhang T, Wen J, He H, Zhang J. Theoretical study on dynamics of the gas phase reactions of CF 3 CF 2 CH 2 OCHF 2 with OH radicals. J Fluor Chem 2014. [DOI: 10.1016/j.jfluchem.2014.08.024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Mishra BK, Singh HJ, Tiwari L. Theoretical investigation on mechanism and kinetics of the Cl-initiated hydrogen abstraction reactions of ethyl trifluoroacetate at 298 K. J Mol Model 2014; 20:2475. [PMID: 25304366 DOI: 10.1007/s00894-014-2475-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2014] [Accepted: 09/21/2014] [Indexed: 11/26/2022]
Abstract
Theoretical investigations were carried out on the gas-phase reactions of CF3C(O)OCH2CH3, ethyl trifluoroacetate (ETFA) with Cl atoms by means of modern density functional theory methods. The optimized geometries, frequencies and minimum energy path were obtained with the hybrid density functional model MPWB1K using the 6-31+G(d,p) basis set. The single point energy calculations were refined further using the G2(MP2) method. Two conformers relatively close in energy were identified for ETFA; both are likely to be important in the temperature range of our study. The existence of transition states on the corresponding potential energy surface was ascertained by performing intrinsic reaction coordinate calculations. The rate constant at 298 K calculated theoretically using canonical transition state theory was found to be in good agreement with experimentally measured values. Our calculations suggest that H abstraction from the -CH2 group is kinetically and thermodynamically more favorable than abstraction from the -CH3 group. The atmospheric lifetime of ETFA with Cl atoms was determined to be 1.98 years. To the best of our knowledge, this work represents the first determination of the rate coefficients for the gas-phase reaction of chlorine atoms in ETFA.
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Affiliation(s)
- Bhupesh Kumar Mishra
- Department of Chemical Sciences, Tezpur University, Tezpur, Napaam, Assam, 784 028, India,
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Mishra BK, Deka RC. A Theoretical Investigation on Kinetics, Mechanism, and Thermochemistry of the Gas-Phase Reactions of Methyl Fluoroacetate with OH Radicals and Fate of Alkoxy Radical. J Phys Chem A 2014; 118:8779-86. [DOI: 10.1021/jp5032042] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Bhupesh Kumar Mishra
- Department of Chemical Sciences, Tezpur University, Napaam, Tezpur, Assam-784 028, India
| | - Ramesh Chandra Deka
- Department of Chemical Sciences, Tezpur University, Napaam, Tezpur, Assam-784 028, India
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13
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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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Mishra BK, Chakrabartty AK, Bhattacharjee D, Deka RC. Theoretical investigation on unimolecular decomposition of malonic acid: a potential sink for ketene. RSC Adv 2014. [DOI: 10.1039/c4ra06506a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
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