Temperature and pressure dependence of ion-molecule association and dissociation reactions: the N-2(+)+N-2(+M)double left right arrow N-4(+)(+M) reaction
2005 | conference paper. A publication with affiliation to the University of Göttingen.
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Temperature and pressure dependence of ion-molecule association and dissociation reactions: the N-2(+)+N-2(+M)double left right arrow N-4(+)(+M) reaction
Troe, J. (2005)
Physical Chemistry Chemical Physics, 7(7) pp. 1560-1567. 85th International Discussion Meeting of the Deutsche-Bunsen-Gesellschaft-fur-Physikalische-Chemie, Marburg, GERMANY.
Cambridge: Royal Soc Chemistry. DOI: https://doi.org/10.1039/b417945p
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Details
- Authors
- Troe, Juergen
- Abstract
- Thermal dissociation and the reverse association reactions of molecular ions can be represented within the same framework as unimolecular reactions of neutral molecules. However, because of different intra- and intermolecular interaction potentials, some differences between ionic and neutral systems should also be expected. Starting from these generalities, the present article analyzes the temperature and pressure dependences of dissociation/association rates of ion-molecule reaction systems. The reaction N-2(+) + N-2 (+ M) double left right arrow N-4(+) (+ M) is considered in particular and falloff curves for this reaction are constructed over the temperature range 5-600 K. Falloff corrections are applied to earlier experiments which allows for a representation of the rate coefficients in terms of a limiting low-pressure rate coefficient k(ass,0)/[N-2] cm(6) molecule(-2) s(-1) = 6.8 x 10(-29)(300 K/T)(2.23) - 5.6 x 10(-31)(300 K/T)(3.12), a limiting high-pressure rate coefficient k(ass,infinity)/cm(3) molecule(-1) s(-1) = 8.33 x 10(-10) [1 + 0.069(300 K/T)(0.33)] and a center broadening factor of the falloff curve F-c = 0.53 +/- 0.05 nearly independent of the temperature. Other examples such as the reactions NH4+ + NH3 double left right arrow N2H7+, C7H7+ + CH3 double left right arrow C8H10+, and C7H7+ + C2H5 double left right arrow C9H12+ are illustrated for comparison.
- Issue Date
- 2005
- Status
- published
- Publisher
- Royal Soc Chemistry
- Journal
- Physical Chemistry Chemical Physics
- Conference
- 85th International Discussion Meeting of the Deutsche-Bunsen-Gesellschaft-fur-Physikalische-Chemie
- Conference Place
- Marburg, GERMANY
- ISSN
- 1463-9076