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Li RR, Hoffmann MR. Theoretical Calculations of the 242 nm Absorption of Propargyl Radical. J Phys Chem A 2021; 125:8595-8602. [PMID: 34570514 DOI: 10.1021/acs.jpca.1c05672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The propargyl radical, the most stable isomer of neutral C3H3, is important in combustion reactions, and a number of spectroscopic and reaction dynamics studies have been performed over the years. However, theoretical calculations have never been able to find a state that can generate strong absorption around 242 nm as seen in experiments. In this study, we calculated the low-lying electronic energy levels of the propargyl radical using the highly accurate multireference configuration interaction singles and doubles method with triples and quadruples treated perturbatively [denoted as MRCISD(TQ)]. Calculations indicate that this absorption can be attributed to a Franck-Condon-allowed electronic transition from the ground 2B1 state to the Rydberg-like excited state 12A1. Further insight into the behavior of the multireference perturbative theory methods, GVVPT2 and GVVPT3, on a very challenging system are also obtained.
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Affiliation(s)
- Run R Li
- Department of Chemistry, University of North Dakota, Grand Forks, North Dakota 58202, United States
| | - Mark R Hoffmann
- Department of Chemistry, University of North Dakota, Grand Forks, North Dakota 58202, United States
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Szczepaniak U, Kołos R, Gronowski M, Guillemin JC, Crépin C. Low Temperature Synthesis and Phosphorescence of Methylcyanotriacetylene. J Phys Chem A 2017; 122:89-99. [PMID: 29216424 DOI: 10.1021/acs.jpca.7b09728] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
This paper reports on UV-stimulated synthesis of methylcyanotriacetylene carried out in cryogenic rare gas matrixes via coupling of smaller precursors: propyne and cyanodiacetylene. The detection was possible due to the strong visible ã 3A' → X̃ 1A1 phosphorescence of CH3C7N, discovered in the course of this work. The ensuing measurements of electronic spectroscopy revealed the formally forbidden B̃ 1E-X̃ 1A1 system, as well as the allowed one Ẽ 1A1-X̃ 1A1, with origins at approximately 3.32 and 5.4 eV, respectively. It was also possible to revisit the spectroscopic characterization of cyanotriacetylene, HC7N, formed in parallel to the title photoproduct. Spectral assignments were assisted with a density functional theory study.
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Affiliation(s)
- Urszula Szczepaniak
- Institut des Sciences Moléculaires d'Orsay (ISMO), UMR8214, CNRS, Univ. Paris-Sud, Université Paris-Saclay , F-91405 Orsay, France.,Institute of Physical Chemistry, Polish Academy of Sciences , Kasprzaka 44/52, PL-01-224 Warsaw, Poland
| | - Robert Kołos
- Institute of Physical Chemistry, Polish Academy of Sciences , Kasprzaka 44/52, PL-01-224 Warsaw, Poland
| | - Marcin Gronowski
- Institute of Physical Chemistry, Polish Academy of Sciences , Kasprzaka 44/52, PL-01-224 Warsaw, Poland
| | - Jean-Claude Guillemin
- Institut des Sciences Chimiques de Rennes, École Nationale Supérieure de Chimie de Rennes, CNRS, UMR 6226 , 11 Allée de Beaulieu, CS 50837, 35708 Rennes Cedex 7, France
| | - Claudine Crépin
- Institut des Sciences Moléculaires d'Orsay (ISMO), UMR8214, CNRS, Univ. Paris-Sud, Université Paris-Saclay , F-91405 Orsay, France
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Guan J, Daljeet R, Song Y. Pressure-selected reactivity between 2-butyne and water induced by two-photon excitation. CAN J CHEM 2017. [DOI: 10.1139/cjc-2017-0155] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
High-pressure photochemistry between 2-butyne (H3CC≡CCH3) and trace amount of H2O was investigated at room temperature using multiline UV radiation at λ ≈ 350 nm and monitored by FTIR spectroscopy. Instead of the expected polymerization of 2-butyne, the IR spectral analysis suggests the formation of cis- and trans-2-butene, as well as 2-butanone, as the primary products. The possible reaction mechanisms and production pathways of these products were examined, where the dissociation of water molecule as the other reactant is believed as the essential step of the photochemical reaction. We further found that initial loading pressure of the mixture can not only substantially influence the reaction kinetics, but also regulate the accessibilities to some reaction channels, which was evidenced by quantitative analysis of the characteristic IR bands of 2-butene and 2-butanone. The relative abundance of two products is found to be highly dependent on pressure and radiation time. This study provides attractive physical routes in the absence of solvents, catalysts, and radical initiators, to synthesis the relevant products with a great selectivity and feasibility.
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Affiliation(s)
- Jiwen Guan
- Department of Physics and Astronomy, University of Western Ontario, London, ON N6A 3K7, Canada
| | - Roshan Daljeet
- Department of Chemistry, University of Western Ontario, London, ON N6A 5B7, Canada
| | - Yang Song
- Department of Physics and Astronomy, University of Western Ontario, London, ON N6A 3K7, Canada
- Department of Chemistry, University of Western Ontario, London, ON N6A 5B7, Canada
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Kerisit N, Rouxel C, Colombel-Rouen S, Toupet L, Guillemin JC, Trolez Y. Synthesis, Chemistry, and Photochemistry of Methylcyanobutadiyne in the Context of Space Science. J Org Chem 2016; 81:3560-7. [DOI: 10.1021/acs.joc.6b00205] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Nicolas Kerisit
- Ecole Nationale
Supérieure de Chimie de Rennes, UMR 6226, CNRS, 11 allée de Beaulieu, CS
50837, 35708 Rennes cedex
7, France
| | - Cédric Rouxel
- Ecole Nationale
Supérieure de Chimie de Rennes, UMR 6226, CNRS, 11 allée de Beaulieu, CS
50837, 35708 Rennes cedex
7, France
| | - Sophie Colombel-Rouen
- Ecole Nationale
Supérieure de Chimie de Rennes, UMR 6226, CNRS, 11 allée de Beaulieu, CS
50837, 35708 Rennes cedex
7, France
| | - Loïc Toupet
- Institut de Physique
de Rennes, UMR 6251, CNRS, Université de Rennes 1, 263 avenue du Général
Leclerc, 35042 Rennes cedex, France
| | - Jean-Claude Guillemin
- Ecole Nationale
Supérieure de Chimie de Rennes, UMR 6226, CNRS, 11 allée de Beaulieu, CS
50837, 35708 Rennes cedex
7, France
| | - Yann Trolez
- Ecole Nationale
Supérieure de Chimie de Rennes, UMR 6226, CNRS, 11 allée de Beaulieu, CS
50837, 35708 Rennes cedex
7, France
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Venghaus F, Eisfeld W. Block-diagonalization as a tool for the robust diabatization of high-dimensional potential energy surfaces. J Chem Phys 2016; 144:114110. [DOI: 10.1063/1.4943869] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Neville SP, Wang Y, Boguslavskiy AE, Stolow A, Schuurman MS. Substituent effects on dynamics at conical intersections: Allene and methyl allenes. J Chem Phys 2016; 144:014305. [DOI: 10.1063/1.4938561] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Simon P. Neville
- Department of Chemistry, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
| | - Yanmei Wang
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, People’s Republic of China
| | - Andrey E. Boguslavskiy
- Department of Chemistry, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
- National Research Council of Canada, 100 Sussex Drive, Ottawa, Ontario K1A 0R6, Canada
- Department of Physics, University of Ottawa, 150 Louis Pasteur, Ottawa ON K1N 6N5, Canada
| | - Albert Stolow
- Department of Chemistry, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
- National Research Council of Canada, 100 Sussex Drive, Ottawa, Ontario K1A 0R6, Canada
- Department of Physics, University of Ottawa, 150 Louis Pasteur, Ottawa ON K1N 6N5, Canada
| | - Michael S. Schuurman
- Department of Chemistry, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
- National Research Council of Canada, 100 Sussex Drive, Ottawa, Ontario K1A 0R6, Canada
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Kerisit N, Toupet L, Trolez Y, Guillemin JC. Methylcyanobutadiyne: Synthesis, X-ray Structure and Photochemistry; Towards an Explanation of Its Formation in the Interstellar Medium. Chemistry 2013; 19:17683-6. [DOI: 10.1002/chem.201303377] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2013] [Indexed: 11/07/2022]
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Zeng Y, Li X, Zhang X, Meng L, Zheng S. Theoretical Studies on the Halogen Bond between Propargyl Radical and Dihalogen Molecules. CHINESE J CHEM 2011. [DOI: 10.1002/cjoc.201190002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Botschwina P, Oswald R. Calculated photoelectron spectra of isotopomers of the propargyl radical (H2C3H): An explicitly correlated coupled cluster study. Chem Phys 2010. [DOI: 10.1016/j.chemphys.2010.07.030] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Castiglioni L, Vukovic S, Crider PE, Lester WA, Neumark DM. Intramolecular competition in the photodissociation of C3D3 radicals at 248 and 193 nm. Phys Chem Chem Phys 2010; 12:10714-22. [DOI: 10.1039/c0cp00380h] [Citation(s) in RCA: 4] [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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Zheng X, Song Y, Zhang J. Ultraviolet Photodissociation Dynamics of the Propargyl Radical. J Phys Chem A 2009; 113:4604-12. [DOI: 10.1021/jp8113336] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xianfeng Zheng
- Department of Chemistry, University of California at Riverside, Riverside, California 92521
| | - Yu Song
- Department of Chemistry, University of California at Riverside, Riverside, California 92521
| | - Jingsong Zhang
- Department of Chemistry, University of California at Riverside, Riverside, California 92521
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Crider PE, Castiglioni L, Kautzman KE, Neumark DM. Photodissociation of the propargyl and propynyl (C3D3) radicals at 248 and 193 nm. J Chem Phys 2009; 130:044310. [DOI: 10.1063/1.3067705] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Gu X, Kaiser RI, Mebel AM. Chemistry of energetically activated cumulenes - from allene (H2CCCH2) to hexapentaene (H2CCCCCCH2). Chemphyschem 2008; 9:350-69. [PMID: 18275046 DOI: 10.1002/cphc.200700609] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
During the last decade, experimental and theoretical studies on the unimolecular decomposition of cumulenes (H(2)C(n)H(2)) from propadiene (H(2)CCCH(2)) to hexapentaene (H(2)CCCCCCH(2)) have received considerable attention due to the importance of these carbon-bearing molecules in combustion flames, chemical vapor deposition processes, atmospheric chemistry, and the chemistry of the interstellar medium. Cumulenes and their substituted counterparts also have significant technical potential as elements for molecular machines (nanomechanics), molecular wires (nano-electronics), nonlinear optics, and molecular sensors. In this review, we present a systematic overview of the stability, formation, and unimolecular decomposition of chemically, photo-chemically, and thermally activated small to medium-sized cumulenes in extreme environments. By concentrating on reactions under gas phase thermal conditions (pyrolysis) and on molecular beam experiments conducted under single-collision conditions (crossed beam and photodissociation studies), a comprehensive picture on the unimolecular decomposition dynamics of cumulenes transpires.
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Affiliation(s)
- Xibin Gu
- Department of Chemistry, University of Hawai'i at Manoa, Honolulu, HI 96822, USA
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Goncher SJ, Moore DT, Sveum NE, Neumark DM. Photofragment translational spectroscopy of propargyl radicals at 248nm. J Chem Phys 2008; 128:114303. [DOI: 10.1063/1.2840350] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Zhou J, Garand E, Eisfeld W, Neumark DM. Slow electron velocity-map imaging spectroscopy of the 1-propynyl radical. J Chem Phys 2007; 127:034304. [PMID: 17655440 DOI: 10.1063/1.2748399] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
High resolution photoelectron spectra of the 1-propynyl and 1-propynyl-d(3) anions acquired with slow electron velocity-map imaging are presented. The electron affinity is determined to be 2.7355+/-0.0010 eV for the 1-propynyl radical and 2.7300+/-0.0010 eV for 1-propynyl-d(3). Several vibronic transitions are observed and assigned using the isotopic shifts and results from ab initio calculations. Good agreement between experimental spectra and calculations suggests a C(3v) geometry for the 1-propynyl radical. No evidence is found for strong vibronic coupling between the ground electronic state and the low-lying first excited state.
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Affiliation(s)
- Jia Zhou
- Department of Chemistry, University of California, Berkeley, California 94720, USA
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Eisfeld W. Calculation of the Vibrationally Resolved Electronic Absorption Spectrum of the Propargyl Radical (H2CCCH). J Phys Chem A 2006; 110:3903-10. [PMID: 16539411 DOI: 10.1021/jp056683s] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The absorption spectrum of the propargyl radical in the region from 180 to 400 nm is investigated in detail by means of theory. Vertical excitation energies and potential energy surfaces are determined by highly accurate multireference configuration interaction (MRCI) calculations. The vibrational dynamics of several electronic states is studied, and line intensities and positions are calculated with respect to the electronic and vibrational ground state. Four electronic states absorb in the region of interest: 1 2B2, 2 2B1, 2 2B2, and 3 2B1. However, electronic excitations into the 2B2 states are dipole-forbidden from the X 2B1 ground state and corresponding vibronically allowed transitions are shown to be weak. The spectrum is dominated by the strong 2 2B1 <-- 1 2B1 band which is computed in overall good agreement with available experiments. A strong absorption at 242 nm, which has been assigned to propargyl, is not confirmed by the calculations, and only very weak absorptions are found at wavelengths shorter than 280 nm. The present results strongly suggest that the 242 nm feature must be due to a different species.
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Affiliation(s)
- Wolfgang Eisfeld
- Theoretische Chemie, Department Chemie, Technische Universität München, D-85747 Garching, Germany.
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18
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Eisfeld W. Ab initio calculation of electronic absorption spectra and ionization potentials of C3H3 radicals. Phys Chem Chem Phys 2005; 7:3924-32. [DOI: 10.1039/b511343a] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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