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Mebel AM, Frenklach M. Cleavage of an aromatic ring and radical migration. Faraday Discuss 2022; 238:512-528. [PMID: 35775600 DOI: 10.1039/d2fd00012a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The present study undertakes a theoretical evaluation of thermal decomposition of aromatic-ring radicals. Potential energy surfaces and associated reaction rate coefficients were calculated for 1- and 2-naphthalenyl, acetanaphthylenyl, and pyrenyl radicals. Kinetic Monte-Carlo simulations were performed to examine the rates of ring cleavage in two sooting laminar premixed flames of ethylene. The simulations showed that the thermal aromatic-ring cleavage is comparable in rate to oxyradical decomposition in a heavier-sooting flame. The simulation also revealed, unexpectedly, fast internal ring radical migration, comparable in frequency to reaction events of aromatic growth.
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Affiliation(s)
- Alexander M Mebel
- Department of Chemistry and Biochemistry, Florida International University, Miami, Florida, 33199, USA.
| | - Michael Frenklach
- Department of Mechanical Engineering, University of California at Berkeley, Berkeley, California, 94720-1740, USA.
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2
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Monluc L, Nikolayev AA, Medvedkov IA, Azyazov VN, Morozov AN, Mebel AM. The Reaction of o-Benzyne with Vinylacetylene: An Unexplored Way to Produce Naphthalene. Chemphyschem 2021; 23:e202100758. [PMID: 34767677 DOI: 10.1002/cphc.202100758] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 11/12/2021] [Indexed: 11/09/2022]
Abstract
The mechanism and kinetics of the reaction of ortho-benzyne with vinylacetylene have been studied by ab initio and density functional CCSD(T)-F12/cc-pVTZ-f12//B3LYP/6-311G(d,p) calculations of the pertinent potential energy surface combined with Rice-Ramsperger-Kassel-Marcus - Master Equation calculations of reaction rate constants at various temperatures and pressures. Under prevailing combustion conditions, the reaction has been shown to predominantly proceed by the biradical acetylenic mechanism initiated by the addition of C4 H4 to one of the C atoms of the triple bond in ortho-benzyne by the acetylenic end, with a significant contribution of the concerted addition mechanism. Following the initial reaction steps, an extra six-membered ring is produced and the rearrangement of H atoms in this new ring leads to the formation of naphthalene, which can further dissociate to 1- or 2-naphthyl radicals. The o-C6 H4 +C4 H4 reaction is highly exothermic, by ∼143 kcal/mol to form naphthalene and by 31-32 kcal mol-1 to produce naphthyl radicals plus H, but features relatively high entrance barriers of 9-11 kcal mol-1 . Although the reaction is rather slow, much slower than the reaction of phenyl radical with vinylacetylene, it forms naphthalene and 1- and 2-naphthyl radicals directly, with their relative yields controlled by the temperature and pressure, and thus represents a viable source of the naphthalene core under conditions where ortho-benzyne and vinylacetylene are available.
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Affiliation(s)
- Lisa Monluc
- Department of Chemistry and Biochemistry, Florida International University, Miami, Florida, 33199, USA.,Present address: Department of Chemistry and Biochemistry, Florida State University, 102 Varsity Way, Tallahassee, FI, 32306, USA
| | - Anatoliy A Nikolayev
- Samara National Research University, Samara, 443086, Russia.,Lebedev Physical Institute, Samara, 443011, Russia
| | - Iakov A Medvedkov
- Samara National Research University, Samara, 443086, Russia.,Lebedev Physical Institute, Samara, 443011, Russia
| | - Valeriy N Azyazov
- Samara National Research University, Samara, 443086, Russia.,Lebedev Physical Institute, Samara, 443011, Russia
| | - Alexander N Morozov
- Department of Chemistry and Biochemistry, Florida International University, Miami, Florida, 33199, USA
| | - Alexander M Mebel
- Department of Chemistry and Biochemistry, Florida International University, Miami, Florida, 33199, USA
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Dyakov YA, Puzankov AA, Adamson SO, Golubkov GV, Morozov II, Olkhov OA, Shapovalov VL, Shestakov DV, Golubkov MG. Dissociation of Phenylacetylene and Its Derivatives by Electron Impact. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B 2020. [DOI: 10.1134/s1990793120050188] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Ashfold MNR, Ingle RA, Karsili TNV, Zhang J. Photoinduced C–H bond fission in prototypical organic molecules and radicals. Phys Chem Chem Phys 2019; 21:13880-13901. [DOI: 10.1039/c8cp07454b] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
We survey and assess current knowledge regarding the primary photochemistry of hydrocarbon molecules and radicals.
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Affiliation(s)
| | | | | | - Jingsong Zhang
- Department of Chemistry
- University of California at Riverside
- Riverside
- USA
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5
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Begušić T, Roulet J, Vaníček J. On-the-fly ab initio semiclassical evaluation of time-resolved electronic spectra. J Chem Phys 2018; 149:244115. [DOI: 10.1063/1.5054586] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- Tomislav Begušić
- Laboratory of Theoretical Physical Chemistry, Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Julien Roulet
- Laboratory of Theoretical Physical Chemistry, Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Jiří Vaníček
- Laboratory of Theoretical Physical Chemistry, Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
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Lucas M, Minor J, Zhang J, Brazier C. H-atom Dissociation Channels in Ultraviolet Photochemistry of m-Pyridyl Radical. CHINESE J CHEM PHYS 2014. [DOI: 10.1063/1674-0068/27/06/621-627] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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McIntosh GJ, Russell DK. Experimental and theoretical studies into the formation of C4-C6 products in partially chlorinated hydrocarbon pyrolysis systems: a probabilistic approach to congener-specific yield predictions. J Phys Chem A 2014; 118:8644-63. [PMID: 25225996 DOI: 10.1021/jp5015516] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
This work presents a study of the pyrolytic formation of vinylacetylene and benzene congeners formed from chlorinated hydrocarbon precursors, a complex, multipath polymerization system formed in a monomer-rich environment. (Co-)pyrolyses of dichloro- and trichloroethylene yield a rich array of products, and assuming a single dominant underlying growth mechanism, this (on comparing expected and observed products) allows a number of potentially competing channels to C4 and C6 products to be ruled out. Poor congener/isomer descriptions rule out even-carbon radical routes, and the absence of C3 and C5 products rule out odd-carbon processes. Vinylidenes appear unable to describe the increased reactivity of acetylenes with chlorination noted in our experiments, leaving molecular acetylene dimerization processes and, in C6 systems, the closely related Diels-Alder cyclization as the likely reaction mechanism. The feasibility of these routes is further supported by ab initio calculations. However, some of the most persuasive evidence is provided by congener-specific yield predictions enabled by the construction of a probability tree analogue of kinetic modeling. This approach is relatively quick to construct, provides surprisingly accurate predictions, and may be a very useful tool in screening for important reaction channels in poorly understood congener- or isomer-rich reaction systems.
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Affiliation(s)
- Grant J McIntosh
- School of Chemical Sciences, University of Auckland , Private Bag 92019, Auckland 1010, New Zealand
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Cole-Filipiak NC, Shapero M, Negru B, Neumark DM. Revisiting the photodissociation dynamics of the phenyl radical. J Chem Phys 2014; 141:104307. [DOI: 10.1063/1.4894398] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Neil C. Cole-Filipiak
- Department of Chemistry, University of California, Berkeley, California 94720, USA and Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Mark Shapero
- Department of Chemistry, University of California, Berkeley, California 94720, USA and Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Bogdan Negru
- Department of Chemistry, University of California, Berkeley, California 94720, USA and Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Daniel M. Neumark
- Department of Chemistry, University of California, Berkeley, California 94720, USA and Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
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Lucas M, Minor J, Zhang J, Brazier C. Ultraviolet Photodissociation Dynamics of the o-Pyridyl Radical. J Phys Chem A 2013; 117:12138-45. [DOI: 10.1021/jp4057237] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Michael Lucas
- Department of Chemistry, University of California at Riverside, Riverside, California
92521, United States
| | - Jasmine Minor
- Department of Chemistry, University of California at Riverside, Riverside, California
92521, United States
| | - Jingsong Zhang
- Department of Chemistry, University of California at Riverside, Riverside, California
92521, United States
| | - Christopher Brazier
- Department of Chemistry and Biochemistry, California State University, Long Beach, Long Beach,
California 90840, United States
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McIntosh GJ, Russell DK. Molecular Mechanisms in the Pyrolysis of Unsaturated Chlorinated Hydrocarbons: Formation of Benzene Rings. 1. Quantum Chemical Studies. J Phys Chem A 2013; 117:4183-97. [DOI: 10.1021/jp3120379] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Grant J. McIntosh
- Department of Chemistry, University of Auckland, Private Bag 92019, Auckland, New Zealand
| | - Douglas K. Russell
- Department of Chemistry, University of Auckland, Private Bag 92019, Auckland, New Zealand
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