1
|
Brown GJ, Ellis MJ, Martin TD, McCunn LR. Vibrational Bands of the 2-Butyn-1-yl Radical. J Phys Chem A 2020; 124:4081-4086. [PMID: 32347722 DOI: 10.1021/acs.jpca.0c02218] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The 2-butyn-1-yl radical is an isomer of C4H5 and is structurally similar to the propargyl radical, which is the simplest resonance-stabilized hydrocarbon radical. The C4H5 radical is likely to be important to astrochemistry and combustion, similar to propargyl, yet little research has been done on its spectroscopic properties. In this work, seven vibrational bands of the 2-butyn-1-yl radical are reported. The radical was formed by pyrolysis of 1-bromo-2-butyne at 800 K and isolated in a low-temperature argon matrix. The experimentally observed frequencies and intensities of the seven vibrational bands were found to be consistent with QCISD predictions from the literature and with new B3LYP calculations in this work.
Collapse
Affiliation(s)
- Glenna J Brown
- Department of Chemistry, Marshall University, 1 John Marshall Drive, Huntington, West Virginia 25755, United States
| | - Martha J Ellis
- Department of Chemistry, Marshall University, 1 John Marshall Drive, Huntington, West Virginia 25755, United States
| | - Thaddeus D Martin
- Department of Chemistry, Marshall University, 1 John Marshall Drive, Huntington, West Virginia 25755, United States
| | - Laura R McCunn
- Department of Chemistry, Marshall University, 1 John Marshall Drive, Huntington, West Virginia 25755, United States
| |
Collapse
|
2
|
Bourgalais J, Caster KL, Durif O, Osborn DL, Le Picard SD, Goulay F. Product Detection of the CH Radical Reactions with Ammonia and Methyl-Substituted Amines. J Phys Chem A 2019; 123:2178-2193. [PMID: 30803230 DOI: 10.1021/acs.jpca.8b11688] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Reactions of the methylidyne (CH) radical with ammonia (NH3), methylamine (CH3NH2), dimethylamine ((CH3)2NH), and trimethylamine ((CH3)3N) have been investigated under multiple collision conditions at 373 K and 4 Torr. The reaction products are detected by using soft photoionization coupled to orthogonal acceleration time-of-flight mass spectrometry at the Advanced Light Source (ALS) synchrotron. Kinetic traces are employed to discriminate between CH reaction products and products from secondary or slower reactions. Branching ratios for isomers produced at a given mass and formed by a single reaction are obtained by fitting the observed photoionization spectra to linear combinations of pure compound spectra. The reaction of the CH radical with ammonia is found to form mainly imine, HN═CH2, in line with an addition-elimination mechanism. The singly methyl-substituted imine is detected for the CH reactions with methylamine, dimethylamine, and trimethylamine. Dimethylimine isomers are formed by the reaction of CH with dimethylamine, while trimethylimine is formed by the CH reaction with trimethylamine. Overall, the temporal profiles of the products are not consistent with the formation of aminocarbene products in the reaction flow tube. In the case of the reactions with methylamine and dimethylamine, product formation is assigned to an addition-elimination mechanism similar to that proposed for the CH reaction with ammonia. However, this mechanism cannot explain the products detected by the reaction with trimethylamine. A C-H insertion pathway may become more probable as the number of methyl groups increases.
Collapse
Affiliation(s)
- Jeremy Bourgalais
- LATMOS/IPSL , UVSQ Université Paris-Saclay , Sorbonne Université, CNRS, 78280 Guyancourt , France
| | - Kacee L Caster
- Department of Chemistry , West Virginia University , Morgantown , West Virginia 26506 , United States
| | - Olivier Durif
- Astrophysique de Laboratoire , Univ Rennes, CNRS, IPR (Institut de Physique de Rennes) - UMR 6251 , F-35000 Rennes , France
| | - David L Osborn
- Combustion Research Facility, Mail Stop 9055 , Sandia National Laboratories , Livermore , California 94551 , United States
| | - Sebastien D Le Picard
- Astrophysique de Laboratoire , Univ Rennes, CNRS, IPR (Institut de Physique de Rennes) - UMR 6251 , F-35000 Rennes , France
| | - Fabien Goulay
- Department of Chemistry , West Virginia University , Morgantown , West Virginia 26506 , United States
| |
Collapse
|
3
|
Mandal M, Ghosh S, Maiti B. Dynamics of the C(3P) + Ethylene Reaction: A Trajectory Surface Hopping Study. J Phys Chem A 2018; 122:3556-3562. [DOI: 10.1021/acs.jpca.8b01386] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mrinmoy Mandal
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - Subhendu Ghosh
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - Biswajit Maiti
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| |
Collapse
|
4
|
Garcia GA, Gans B, Krüger J, Holzmeier F, Röder A, Lopes A, Fittschen C, Alcaraz C, Loison JC. Valence shell threshold photoelectron spectroscopy of C3Hx (x = 0–3). Phys Chem Chem Phys 2018. [DOI: 10.1039/c8cp00510a] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We present the photoelectron spectra of C3Hx (x = 0–3) formed in a microwave discharge flow-tube reactor by consecutive H abstractions from C3H4 (C3Hx + F → C3Hx−1 + HF (x = 1–4)), but also from F + CH4 schemes by secondary reactions.
Collapse
Affiliation(s)
| | | | - Julia Krüger
- Synchrotron SOLEIL
- L'Orme des Merisiers
- Gif sur Yvette
- France
| | - Fabian Holzmeier
- Synchrotron SOLEIL
- L'Orme des Merisiers
- Gif sur Yvette
- France
- Laboratoire de Chimie Physique d'Orsay
| | - Anja Röder
- Synchrotron SOLEIL
- L'Orme des Merisiers
- Gif sur Yvette
- France
| | - Allan Lopes
- CNRS – Université Paris-Sud et Paris-Saclay
- Laboratoire de Chimie Physique
- UMR 8000
- Centre Universitaire Paris-Sud
- 91405 Orsay
| | | | - Christian Alcaraz
- CNRS – Université Paris-Sud et Paris-Saclay
- Laboratoire de Chimie Physique
- UMR 8000
- Centre Universitaire Paris-Sud
- 91405 Orsay
| | | |
Collapse
|
5
|
Sztáray B, Voronova K, Torma KG, Covert KJ, Bodi A, Hemberger P, Gerber T, Osborn DL. CRF-PEPICO: Double velocity map imaging photoelectron photoion coincidence spectroscopy for reaction kinetics studies. J Chem Phys 2017; 147:013944. [DOI: 10.1063/1.4984304] [Citation(s) in RCA: 89] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Bálint Sztáray
- Department of Chemistry, University of the Pacific, Stockton, California 95211, USA
| | - Krisztina Voronova
- Department of Chemistry, University of the Pacific, Stockton, California 95211, USA
| | - Krisztián G. Torma
- Department of Chemistry, University of the Pacific, Stockton, California 95211, USA
| | - Kyle J. Covert
- Department of Chemistry, University of the Pacific, Stockton, California 95211, USA
| | - Andras Bodi
- Laboratory for Femtochemistry and Synchrotron Radiation, Paul Scherrer Institute (PSI), CH-5232 Villigen, Switzerland
| | - Patrick Hemberger
- Laboratory for Femtochemistry and Synchrotron Radiation, Paul Scherrer Institute (PSI), CH-5232 Villigen, Switzerland
| | - Thomas Gerber
- Laboratory for Femtochemistry and Synchrotron Radiation, Paul Scherrer Institute (PSI), CH-5232 Villigen, Switzerland
| | - David L. Osborn
- Combustion Research Facility, Sandia National Laboratories, Livermore, California 94551, USA
| |
Collapse
|
6
|
Bourgalais J, Spencer M, Osborn DL, Goulay F, Le Picard SD. Reactions of Atomic Carbon with Butene Isomers: Implications for Molecular Growth in Carbon-Rich Environments. J Phys Chem A 2016; 120:9138-9150. [PMID: 27798961 DOI: 10.1021/acs.jpca.6b09785] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- J. Bourgalais
- Institut
de Physique de Rennes, Département de Physique Moléculaire, Astrophysique de Laboratoire, UMR CNRS 6251, Université de Rennes 1, Campus de Beaulieu, 35042 Rennes Cedex, France
| | - Michael Spencer
- Department
of Chemistry, West Virginia University, Morgantown, West Virginia 26506, United States
| | - David L. Osborn
- Combustion
Research Facility, Mail Stop 9055, Sandia National Laboratories, Livermore, California 94551, United States
| | - F. Goulay
- Department
of Chemistry, West Virginia University, Morgantown, West Virginia 26506, United States
| | - S. D. Le Picard
- Institut
de Physique de Rennes, Département de Physique Moléculaire, Astrophysique de Laboratoire, UMR CNRS 6251, Université de Rennes 1, Campus de Beaulieu, 35042 Rennes Cedex, France
| |
Collapse
|
7
|
Bourgalais J, Capron M, Kailasanathan RKA, Osborn DL, Hickson KM, Loison JC, Wakelam V, Goulay F, Picard SDL. THE C(3P) + NH3REACTION IN INTERSTELLAR CHEMISTRY. I. INVESTIGATION OF THE PRODUCT FORMATION CHANNELS. ACTA ACUST UNITED AC 2015. [DOI: 10.1088/0004-637x/812/2/106] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|