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Article on an investigation of the gas-phase kinetics of the reaction K + SO₂ + Ar.
Physical Description
3 p.
Notes
Abstract: The recombination of atomic potassium, K(4²S), with SO₂ has been investigated at about 863 K, in a bath of Ar at pressures from 20 to 690 mbar. K was generated by flash photolysis of KI vapor and monitored by time-resolved resonance absorption of a ᴅ-line at 766 nm under pseudo-first-order conditions. The measured pseudo-second-order rate constants lie in the low-pressure and falloff regions and were fitted with an empirical RRKM expression to yield k₀ = 5.9 x 10⁻²⁹ cm⁶ s⁻¹ and k∞ = 6.2 x 10⁻¹⁰ cm³ s⁻¹. Error limits are discussed in the text. The KSO₂ adduct was characterized by ab initio methods. An RRKM analysis of k₀, together with a lower limit to the equilibrium constant, yielded a K-SO₂ bond strength of 190 ± 10 kJ mol⁻¹. k∞ was shown to be consistent with a simple harpoon model for electron transfer.
Reprinted with permission from the Journal of Physical Chemistry. Copyright 1993 American Chemical Society.
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Goumri, Abdellatif; Laakso, Dianna; Rocha, John-David Ray; Francis, Elizabeth & Marshall, Paul.Investigation of the Gas-Phase Kinetics of the Reaction K + SO₂ + Ar,
article,
May 1993;
[Washington, D.C.].
(https://digital.library.unt.edu/ark:/67531/metadc503247/:
accessed April 23, 2024),
University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu;
crediting UNT College of Arts and Sciences.
