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Lowe B, Cardona AL, Salas J, Bodi A, Mayer PM, Burgos Paci MA. Probing the pyrolysis of ethyl formate in the dilute gas phase by synchrotron radiation and theory. JOURNAL OF MASS SPECTROMETRY : JMS 2023; 58:e4901. [PMID: 36691327 DOI: 10.1002/jms.4901] [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: 10/31/2022] [Accepted: 01/02/2023] [Indexed: 06/17/2023]
Abstract
The thermal decomposition of the atmospheric constituent ethyl formate was studied by coupling flash pyrolysis with imaging photoelectron photoion coincidence (iPEPICO) spectroscopy using synchrotron vacuum ultraviolet (VUV) radiation at the Swiss Light Source (SLS). iPEPICO allows photoion mass-selected threshold photoelectron spectra (ms-TPES) to be obtained for pyrolysis products. By threshold photoionization and ion imaging, parent ions of neutral pyrolysis products and dissociative photoionization products could be distinguished, and multiple spectral carriers could be identified in several ms-TPES. The TPES and mass-selected TPES for ethyl formate are reported for the first time and appear to correspond to ionization of the lowest energy conformer having a cis (eclipsed) configuration of the O=C(H)-O-C(H2 )-CH3 and trans (staggered) configuration of the O=C(H)-O-C(H2 )-CH3 dihedral angles. We observed the following ethyl formate pyrolysis products: CH3 CH2 OH, CH3 CHO, C2 H6 , C2 H4 , HC(O)OH, CH2 O, CO2 , and CO, with HC(O)OH and C2 H4 pyrolyzing further, forming CO + H2 O and C2 H2 + H2 . The reaction paths and energetics leading to these products, together with the products of two homolytic bond cleavage reactions, CH3 CH2 O + CHO and CH3 CH2 + HC(O)O, were studied computationally at the M06-2X-GD3/aug-cc-pVTZ and SVECV-f12 levels of theory, complemented by further theoretical methods for comparison. The calculated reaction pathways were used to derive Arrhenius parameters for each reaction. The reaction rate constants and branching ratios are discussed in terms of the residence time and newly suggest carbon monoxide as a competitive primary fragmentation product at high temperatures.
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Affiliation(s)
- Bethany Lowe
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Canada
| | - Alejandro L Cardona
- INFIQC - CONICET, Departamento fisicoquímica, Universidad Nacional de Córdoba, Córdoba, Argentina
| | - Juana Salas
- INFIQC - CONICET, Departamento fisicoquímica, Universidad Nacional de Córdoba, Córdoba, Argentina
| | - Andras Bodi
- Laboratory for Synchrotron Radiation and Femtochemistry, Paul Scherrer Institute, Villigen, Switzerland
| | - Paul M Mayer
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Canada
| | - Maxi A Burgos Paci
- INFIQC - CONICET, Departamento fisicoquímica, Universidad Nacional de Córdoba, Córdoba, Argentina
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Samdal S, Møllendal H, Carles S. Rotational Spectrum, Conformational Composition, and Quantum Chemical Calculations of Cyanomethyl Formate (HC(O)OCH 2C≡N), a Compound of Potential Astrochemical Interest. J Phys Chem A 2015. [DOI: 10.1021/acs.jpca.5b05285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Svein Samdal
- Centre
for Theoretical and Computational Chemistry (CTCC), Department of
Chemistry, University of Oslo, P.O. Box 1033, Blindern, NO-0315 Oslo, Norway
| | - Harald Møllendal
- Centre
for Theoretical and Computational Chemistry (CTCC), Department of
Chemistry, University of Oslo, P.O. Box 1033, Blindern, NO-0315 Oslo, Norway
| | - Sophie Carles
- Institut
de Physique de Rennes, Département de Physique Moléculaire,
UMR 6251 UR1-CNRS, Université de Rennes 1, Bâtiment
11 C, Campus de Beaulieu, F-35042 Rennes Cedex, France
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Chou YC. A Theoretical Investigation of the Decomposition Reactions of Ethyl Formate in the S1and T1States. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.201200551] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Chou YC. A Theoretical Investigation of the Decomposition Reactions of Ethyl Formate in the S0State. J CHIN CHEM SOC-TAIP 2012. [DOI: 10.1002/jccs.201200197] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Evangelisti L, Grabowiecki A, van Wijngaarden J. Chirped Pulse Fourier Transform Microwave Study of 2,2,2-Trifluoroethyl Formate. J Phys Chem A 2011; 115:8488-92. [DOI: 10.1021/jp2047129] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Naganathappa M, Chaudhari A. Effect of ionization on infrared and electronic absorption spectra of methyl and ethyl formate in the gas phase and in astrophysical H2O ice: a computational study. J Phys Chem A 2011; 115:4743-56. [PMID: 21504217 DOI: 10.1021/jp112373k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
This work reports infrared and electronic absorption spectra of trans and gauche conformers of neutral ethyl formate, trans and cis conformers of neutral methyl formate, their ions in the gas phase, and neutral ethyl and methyl formate in astrophysical H(2)O ice. The second-order Møller-Plesset perturbation (MP2) method with TZVP basis set has been used to obtain ground-state geometries. An influence of ice on vibrational frequencies of neutral ethyl and methyl formate was obtained using integral equation formalism polarizable continnum model (IEFPCM). Significant shift in vibrational frequencies for neutral methyl and ethyl formate when studied in H(2)O ice and upon ionization is observed. Rotational and distortion constants for neutral ethyl and methyl formate from this work are in excellent agreement with the available experimental values. Electronic absorption spectra of conformers of ethyl and methyl formate and their ions are obtained using time-dependent density functional method (TDDFT). The nature of electronic transitions is also identified. We suggested lines especially good to detect these molecules in interstellar medium. Using these lines, we can identify the conformers of ethyl and methyl formate in gas phase and H(2)O ice in interstellar medium. This comparative study should provide useful guidelines to detect conformers of ethyl and methyl formate and their ions in gas phase and neutral molecules in H(2)O ice in different astronomical environment.
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Lavoie S, McBreen PH. Evidence for C-H...O=C bonding in coadsorbed aromatic-carbonyl systems on Pt(111). J Phys Chem B 2007; 109:11986-90. [PMID: 16852478 DOI: 10.1021/jp051216w] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The coadsorption of ethyl formate, acetone, and methyl pyruvate with benzene and naphthalene on Pt(111) was studied with reflection absorption infrared spectroscopy (RAIRS) and thermal desorption (TPD) measurements. Coadsorbed benzene or naphthalene are found to convert eta1- and eta2-states of ethyl formate and acetone into new states displaying slightly red-shifted carbonyl bands. Similarly, coadsorption converts the enediolate state of methyl pyruvate into a new adsorption geometry in which the carbonyl bands are silent. In each case, coadsorption of the aromatic leads to significantly modified carbonyl desorption spectra. The results suggest an attractive carbonyl-aromatic interaction that weakens or removes the direct interaction of the carbonyl function with the metal surface. The aromatic-carbonyl interaction is attributed to hydrogen bonding between C-H and C=O, enhanced by the chemisorption induced polarization of the aromatic.
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Affiliation(s)
- Stéphane Lavoie
- Département de Chimie, Université Laval, Québec (QC), Canada G1K 7P4
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Chen C, Clarke ML, Wang J, Chen Z. Comparison of surface structures of poly(ethyl methacrylate) and poly(ethyl acrylate) in different chemical environments. Phys Chem Chem Phys 2005; 7:2357-63. [DOI: 10.1039/b501910a] [Citation(s) in RCA: 36] [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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Dahlqvist M, Hotokka M, Räsänen M. Conformational analysis of dichloromethyl formate by the combined use of infrared and matrix-infrared spectroscopy and ab initio calculations. Phys Chem Chem Phys 2003. [DOI: 10.1039/b306275a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Sumathi R, Carstensen HH, Green WH. Reaction Rate Predictions Via Group Additivity. Part 3: Effect of Substituents with CH2 as the Mediator. J Phys Chem A 2002. [DOI: 10.1021/jp013957c] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Raman Sumathi
- Department of Chemical Engineering, Massachusetts Institute of Technology, 25 Ames Street, Cambridge, Massachusetts 02139
| | - Hans-Heinrich Carstensen
- Department of Chemical Engineering, Massachusetts Institute of Technology, 25 Ames Street, Cambridge, Massachusetts 02139
| | - William H. Green
- Department of Chemical Engineering, Massachusetts Institute of Technology, 25 Ames Street, Cambridge, Massachusetts 02139
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Shishkov IF, Shlykov S, Rousseau B, Peng ZH, Van Alsenoy C, Geise HJ, Kataeva ON, Herrebout WA, Van der Veken B. Gas-Phase Conformations of 3-Buten-2-ol from Density-Functional Theoretical Results Together with Electron-Diffraction and Vibrational Spectroscopic Data. J Phys Chem A 2001. [DOI: 10.1021/jp002616g] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | | | | | | | | | - O. N. Kataeva
- A.E. Arbuzov Institute of Organic and Physical Chemistry, Russian Academy of Sciences, A.E. Arbuzov street 8, Kazan 420083, Russia
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Wang J, Castonguay M, Roy JR, Zahidi E, McBreen PH. Gauche-Trans Conformational Changes in Ethyl Formate Chemisorbed on Ni(111): Coverage-Dependent RAIRS Spectra. J Phys Chem B 1999. [DOI: 10.1021/jp983601+] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Hagen K, Naumov V. Structure and Conformational Composition of Chloromethyl Chloroformate: An Electron-Diffraction and ab Initio Molecular Orbital Investigation. J Phys Chem A 1998. [DOI: 10.1021/jp981744q] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Kolbjørn Hagen
- Department of Chemistry, Norwegian University of Science and Technology, Rosenborg, N-7034 Trondheim, Norway
| | - Victor Naumov
- A. E. Arbuzov Institute of Organic and Physical Chemistry, Russian Academy of Sciences, 420088, Arbuzov str. 8, Kazan, Russia
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Wu G, Shlykov S, Van Alsenoy C, Geise HJ, Sluyts E, Van der Veken BJ. Formic Acetic Anhydride in the Gas Phase, Studied by Electron Diffraction and Infrared Spectroscopy, Supplemented with ab-Initio Calculations of Geometries and Force Fields. ACTA ACUST UNITED AC 1996. [DOI: 10.1021/jp9607982] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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