Ion trap study of the isotope exchange in the low-temperature collisions of OD<superscript>-</superscript> anions with HD.
In: Molecular Physics, Jg. 122 (2024), Heft 1/2, S. 1-9
Online
academicJournal
Zugriff:
The rate coefficients k1 and k2 of the reaction $ \hbox{OD}^- + \hbox{HD} \mathop{\rightleftarrows}\limits_{k_2}^{k_1} \hbox{OH}^- + \hbox{D}_2 $ OD − + HD ⇄ k 2 k 1 OH − + D 2 in the forward and reverse direction were measured in the temperature ranges of 15 K–273 K and 95 K–300 K, respectively. The experiments were carried out in a temperature-variable cryogenic linear 22-pole radio-frequency ion trap instrument. The temperature dependence of the equilibrium constant $ { {K_{{\rm eq}12}}}(T) $ K e q 12 (T) obtained from the measured data is in good agreement with the value calculated using the detailed balance principle under the Born-Oppenheimer approximation. The enthalpy and the entropy of the reaction obtained from the linear Van't Hoff equation are $ { {\Delta H}} = (20 \pm 2 \pm 3^{{\rm sys}})\,{\rm meV} $ Δ H = (20 ± 2 ± 3 s y s ) m e V and $ { {\Delta S}} = (5.9 \pm 1.8 \pm 1.4^{{\rm sys}})\,{\rm J}/{\rm mol}\,{\rm K} $ Δ S = (5.9 ± 1.8 ± 1.4 s y s ) J / m o l K , respectively. [ABSTRACT FROM AUTHOR]
Titel: |
Ion trap study of the isotope exchange in the low-temperature collisions of OD<superscript>-</superscript> anions with HD.
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Autor/in / Beteiligte Person: | Roučka, Štěpán ; Rednyk, Serhiy ; Palacký, Jakub ; Dohnal, Petr ; Glosík, Juraj ; Plašil, Radek |
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Zeitschrift: | Molecular Physics, Jg. 122 (2024), Heft 1/2, S. 1-9 |
Veröffentlichung: | 2024 |
Medientyp: | academicJournal |
ISSN: | 0026-8976 (print) |
DOI: | 10.1080/00268976.2023.2232479 |
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