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IJJAALI FATIMA, ALCAMÍ MANUEL, MÓ OTILIA, YÁÑEZ MANUEL. Thermochemistry of the reactions between CN+ and H2O in the gas phase. Mol Phys 2009. [DOI: 10.1080/00268970110042848] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Affiliation(s)
- FATIMA IJJAALI
- a Departamento de Química , C-9, Universidad Autónoma de Madrid , Cantoblanco , 28049 , Madrid , Spain
| | - MANUEL ALCAMÍ
- a Departamento de Química , C-9, Universidad Autónoma de Madrid , Cantoblanco , 28049 , Madrid , Spain
| | - OTILIA MÓ
- a Departamento de Química , C-9, Universidad Autónoma de Madrid , Cantoblanco , 28049 , Madrid , Spain
| | - MANUEL YÁÑEZ
- a Departamento de Química , C-9, Universidad Autónoma de Madrid , Cantoblanco , 28049 , Madrid , Spain
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2
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Stevens JE, Davis LW, Mertes CD. Reactions of CF3CH2I+O(3P): competing mechanisms of HF elimination. J Chem Phys 2007; 126:074310. [PMID: 17328608 DOI: 10.1063/1.2484163] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Ab initio density functional and molecular orbital calculations provide singlet and triplet electronic potential energy surfaces for the reactions of CF3CH2I+O(3P) leading to OI and HF eliminations, reactions which have been the subject of recent experimental studies. A barrier to OI formation occurs on the triplet potential energy surface; there is no reverse barrier to OI formation on the singlet pathway. Findings suggest that two competing pathways may form HF. One is an addition-insertion-elimination process involving insertion of O into the C-I bond. The alternate path involves OI elimination, addition of an O atom to CF3CH2, and subsequent HF elimination. The computed reactant pathways and energetics are discussed in relation to recent experiments.
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Affiliation(s)
- Jonathan E Stevens
- Department of Chemistry and Biochemistry, University of Detroit Mercy, Detroit, Michigan 48221, USA
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Abstract
Pure rotational spectra of hypoiodous acid, HOI, and its deuterated species, DOI, were measured in the frequency range of 320-670 GHz. The molecule was efficiently produced by a reaction of atomic oxygen with iodoethane. Rotational constants and centrifugal distortion constants for the molecule were determined accurately. The vibrationally averaged structure for HOI was obtained by taking the isotopic difference of the OH bond length into consideration: r(z)(OH)=0.967(8) A, r(z)(OI)=1.9941(3) A, and theta(z)(HOI)=103.89 degrees, where the errors were estimated from the residual inertial defect. Equilibrium bond lengths for the OH and OI bonds were derived as 0.959(8) A and 1.9874(3) A, respectively, by assuming anharmonic constants of the corresponding diatomic molecules. Electric-quadrupole interaction constants and nuclear-spin-rotation coupling constants for the iodine nucleus were obtained. Nonaxial terms of the electric-quadrupole constant for HOI can be determined as well, which enabled us to derive the principal values of the coupling tensor. The values obtained were used to gauge the ionicity of the X-O bond in the HOX molecular system. The nuclear-spin-rotation coupling constant along the a inertial axis is found to be significantly smaller than others, which may be explained by a contribution from two low-lying singlet excited states.
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Affiliation(s)
- Hiroyuki Ozeki
- ISS Science Project Office, Japan Aerospace Exploration Agency, Tsukuba Space Center, 2-1-1 Sengen, Tsukuba 305-8585, Japan.
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Stevens JE, Kaufman MS, Morokuma K. Molecular orbital study of mechanisms of the reactions of alkyl bromides with O(3P) atoms. J Chem Phys 2003. [DOI: 10.1063/1.1560135] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
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Marcy TP, Reid JP, Qian CXW, Leone SR. Addition-insertion-elimination reactions of O(3P) with halogenated iodoalkanes producing HF(v) and HCl(v). J Chem Phys 2001. [DOI: 10.1063/1.1337800] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
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6
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Reid JP, Marcy TP, Kuehn S, Leone SR. The direct production of CO(v=1–9) in the reaction of O(3P) with the ethyl radical. J Chem Phys 2000. [DOI: 10.1063/1.1288791] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Abstract
▪ Abstract This article reviews recent progress in our understanding of gas-phase neutral reaction dynamics as made possible by improvements in the crossed molecular beam scattering technique for measuring reactive differential cross sections. A selection of crossed-beam studies on systems that play a fundamental role in our basic understanding of reaction phenomena are discussed to illustrate the capabilities of the experimental method. The examples include benchmark atom-diatom abstraction and insertion reactions, and four-atom radical reactions for which state-to-state, state-resolved, or state-averaged differential cross sections have recently been measured. The results are discussed in the light of the latest related theoretical developments regarding the treatment of potential energy surfaces and the dynamics of the systems. Recent results on crossed-beam studies of chemically relevant reactions of carbon, nitrogen, and oxygen atoms are also reviewed, and the latest developments in the technique are noted.
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Affiliation(s)
- P Casavecchia
- Dipartimento di Chimica, Università di Perugia, 06123 Perugia, Italy.
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Allanic A, Rossi MJ. Heterogeneous reactions of HOI on substrates of atmospheric importance. ACTA ACUST UNITED AC 1999. [DOI: 10.1029/1999jd900285] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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Loomis RA, Leone SR, Gilles MK. Novel five-membered ring intermediates in gas phase reactions. RESEARCH ON CHEMICAL INTERMEDIATES 1998. [DOI: 10.1163/156856798x00384] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Berry RJ, Yuan J, Misra A, Marshall P. Experimental and Computational Investigations of the Reaction of OH with CF3I and the Enthalpy of Formation of HOI. J Phys Chem A 1998. [DOI: 10.1021/jp980645+] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Gao X, Essex-Lopresti J, Munro S, Hall MP, Smith DJ, Grice R. Role of Renner Teller and Spin−Orbit Interaction in the Dynamics of the O(3P) + CH2ICl Reaction. J Phys Chem A 1998. [DOI: 10.1021/jp973079b] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- X. Gao
- Chemistry Department, University of Manchester, Manchester, M13 9PL, U.K
| | - J. Essex-Lopresti
- Chemistry Department, University of Manchester, Manchester, M13 9PL, U.K
| | - S. Munro
- Chemistry Department, University of Manchester, Manchester, M13 9PL, U.K
| | - M. P. Hall
- Chemistry Department, University of Manchester, Manchester, M13 9PL, U.K
| | - D. J. Smith
- Chemistry Department, University of Manchester, Manchester, M13 9PL, U.K
| | - R. Grice
- Chemistry Department, University of Manchester, Manchester, M13 9PL, U.K
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Lindner J, Loomis RA, Klaassen JJ, Leone SR. A laser photolysis/time-resolved Fourier transform infrared emission study of OH(X 2Π,v) produced in the reaction of alkyl radicals with O(3P). J Chem Phys 1998. [DOI: 10.1063/1.475575] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
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Stevens JE, Cui Q, Morokuma K. An ab initio investigation of spin-allowed and spin-forbidden pathways of the gas phase reactions of O(3P)+C2H5I. J Chem Phys 1998. [DOI: 10.1063/1.475525] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Clark RJH, Dann JR, Foley LJ. Photochemical Reaction of Ozone with 2-Iodopropane and the Four Polyfluoroiodoethanes C2F5I, CF3CH2I, CF2HCF2I, and CF3CFHI in Solid Argon at 14 K. FTIR Spectra of the Iodoso-Intermediates (Z−IO), the Iodyl-Intermediates (Z−IO2), and the Various Complexes (CH3)2CO···HI, CF3C(O)H···XI, CF2HC(O)F···IF, and CF3C(O)F···XI (Where X = H or F). J Phys Chem A 1997. [DOI: 10.1021/jp972139a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Robin J. H. Clark
- Christopher Ingold Laboratories, University College London, 20 Gordon Street, London WC1H 0AJ, U.K
| | - Jonathan R. Dann
- Christopher Ingold Laboratories, University College London, 20 Gordon Street, London WC1H 0AJ, U.K
| | - Loraine J. Foley
- Christopher Ingold Laboratories, University College London, 20 Gordon Street, London WC1H 0AJ, U.K
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Misra A, Berry RJ, Marshall P. Potential Energy Surfaces for the Reaction of O Atoms with CH3I: Implications for Thermochemistry and Kinetics. J Phys Chem A 1997. [DOI: 10.1021/jp971337z] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Ashutosh Misra
- Department of Chemistry, University of North Texas, PO Box 305070, Denton, Texas 76203, and Center for Computational Modeling of Nonstructural Materials, Wright Laboratory, Wright-Patterson Air Force Base, Ohio 45433
| | - R. J. Berry
- Department of Chemistry, University of North Texas, PO Box 305070, Denton, Texas 76203, and Center for Computational Modeling of Nonstructural Materials, Wright Laboratory, Wright-Patterson Air Force Base, Ohio 45433
| | - Paul Marshall
- Department of Chemistry, University of North Texas, PO Box 305070, Denton, Texas 76203, and Center for Computational Modeling of Nonstructural Materials, Wright Laboratory, Wright-Patterson Air Force Base, Ohio 45433
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