Dissociative charge transfer in reactions of CCl4 and SF6 with ions having recombination energies between 6.4 eV and 24.5 eV

Williams, Ted L.; Babcock, L; Adams, Nigel G.

doi:10.1016/s1387-3806(98)14189-1

Cited by 18 publications

(53 citation statements)

References 37 publications

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“…[1][2][3][4][5][6] These studies have been explorations of fundamental ion-molecule chemistry, [1][2][3][4] and have addressed important questions in applied sciences, such as the possible effects of ion reactions on the atmospheric lifetime of SF 6 and the use of SF 6 in industrial plasma processes. 5,6 In contrast, no information is available on the positive ion chemistry of the homologous molecules SeF 6 and TeF 6 . Here we report the first study of the positive ion chemistry of SeF 6 and TeF 6 .…”

Section: Introductionmentioning

confidence: 99%

“…5,6 In contrast, no information is available on the positive ion chemistry of the homologous molecules SeF 6 and TeF 6 . Here we report the first study of the positive ion chemistry of SeF 6 and TeF 6 . An objective of this study is to explore the nature of the reaction ion chemistry as the central atom in a hexafluoride molecule is changed.…”

Section: Introductionmentioning

confidence: 99%

“…An objective of this study is to explore the nature of the reaction ion chemistry as the central atom in a hexafluoride molecule is changed. Differences in the reaction dynamics and kinetics may shed light on the ion chemistry occurring in SF 6 -containing plasmas. 6 Furthermore, this study is of fundamental interest in the interpretation and understanding of ion-molecule reactions.…”

Section: Introductionmentioning

confidence: 99%

“…For completeness and for ease of comparison, the reactions of the other ions with SF 6 , which have been previously studied, [1][2][3][4][5][6] are presented here. Of these, the reactions of H 3 O + , CF 3 + , CO 2 + , CO + , N 2 + , Ar + , and Ne + with SF 6 have been reinvestigated in this study, and here there is good agreement in both the rate coefficients and the product ion branching ratios with those obtained in the other studies.…”

Section: Introductionmentioning

confidence: 99%

“…For example, charge (electron) transfer will only be energetically possible for those ions having recombination energies greater than the first dissociative ionisation limit of the XF 6 molecule (X = S, Se or Te), XF 6 XF 5 + + F + e -. The first dissociative ionisation limit is used because threshold photoelectron-photoion coincidence (TPEPICO) studies show that the ground state of XF 6 + is not a stable ion and dissociates to XF 5 + + F. 7,8 (Any bound region of the XF 6 + potential energy surface lies well outside that accessible from the neutral XF 6 ground state.)…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

A Selected Ion Flow Tube Study of the Reactions of Several Cations with the Group 6B Hexafluorides SF₆, SeF₆, and TeF₆

et al. 2000

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A Selected Ion Flow Tube Study of the Reactions of Several Cations with the Group 6B Hexafluorides SF₆, SeF₆, and TeF₆

et al. 2000

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Theoretical study of the anthropogenic greenhouse gas (SF₅CF₃) and analysis of the reaction of SF₆ with CF

Morgon

2011

Int J of Quantum Chemistry

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SF 5 CF 3 was recently detected in the earth's atmosphere. This has lead to various experimental and theoretical studies aimed at establishing the properties of this molecule, from which to understand how it is formed, how it may impact on the atmosphere (it is a powerful greenhouse gas), and how it may be destroyed in the atmosphere. SF 5 CF 3 is chemically very inert, and is not destroyed in the troposhere. Theoretical calculations using effective core potential (ECP) based on high-level methods -QCISD(T), were performed for molecular systems related to SF 5 CF 3 . Existing values for the S-C bond dissociation energy in SF 5 CF 3 span a wide range, from estimates of about 200 to 300 kJ mol −1 , obtained from theoretical calculations on SF 5 CF 3 using the DFT, G2, and G3 protocols, to 390 ± 45 kJ mol −1 derived from experimental studies of the photoionisation of SF 5 CF 3 . At the QCISD(T)/ECP+GCM (generator coordinate method) level, the dissociation energy -D o (SF 5 -CF 3 , 0 K), is 274.7 kJ mol −1 . In addition to calculations on individual molecules, the reactions of SF 6 with CF − 3 were studied. The first objective was to locate the reactant ion-molecule complex, the transition state, and the product ion-molecule complex for each of these systems. On the basis of literature thermochemistry, the reaction of SF 6 with CF

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Reliability of estimation of recombination energies of molecular radical cations by charge exchange and a test of the exoergicity rule

Youn

Choe

Kim

2003

Rapid Comm Mass Spectrometry

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Charge exchange occurring in a collision cell of a mass spectrometer was used previously to find the very long-lived excited electronic states of molecular cations generated by electron ionization. The underlying criterion in the method, called the exoergicity rule, was that only electronically exoergic and resonant processes have large cross sections at low collision energy. The validity of this rule has been checked in this work by estimating the recombination energies of some molecular ions based on the presence/absence of charge-exchange signals from gases with different ionization energies, and comparing these estimates with the literature values. It is concluded that a recombination energy can be estimated to within an upper limit uncertainty of 0.1 eV with this technique, which validates the exoergicity rule proposed previously.

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Dissociative charge transfer in reactions of CCl4 and SF6 with ions having recombination energies between 6.4 eV and 24.5 eV

Cited by 18 publications

References 37 publications

A Selected Ion Flow Tube Study of the Reactions of Several Cations with the Group 6B Hexafluorides SF₆, SeF₆, and TeF₆

A Selected Ion Flow Tube Study of the Reactions of Several Cations with the Group 6B Hexafluorides SF₆, SeF₆, and TeF₆

Theoretical study of the anthropogenic greenhouse gas (SF₅CF₃) and analysis of the reaction of SF₆ with CF

Reliability of estimation of recombination energies of molecular radical cations by charge exchange and a test of the exoergicity rule

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Dissociative charge transfer in reactions of CCl4 and SF6 with ions having recombination energies between 6.4 eV and 24.5 eV

Cited by 18 publications

References 37 publications

A Selected Ion Flow Tube Study of the Reactions of Several Cations with the Group 6B Hexafluorides SF6, SeF6, and TeF6

A Selected Ion Flow Tube Study of the Reactions of Several Cations with the Group 6B Hexafluorides SF6, SeF6, and TeF6

Theoretical study of the anthropogenic greenhouse gas (SF5CF3) and analysis of the reaction of SF6 with CF

Reliability of estimation of recombination energies of molecular radical cations by charge exchange and a test of the exoergicity rule

Contact Info

Product

Resources

About

A Selected Ion Flow Tube Study of the Reactions of Several Cations with the Group 6B Hexafluorides SF₆, SeF₆, and TeF₆

A Selected Ion Flow Tube Study of the Reactions of Several Cations with the Group 6B Hexafluorides SF₆, SeF₆, and TeF₆

Theoretical study of the anthropogenic greenhouse gas (SF₅CF₃) and analysis of the reaction of SF₆ with CF