H/D exchange in reactions of OH- with D-2 and of OD- with H-2 at low temperatures

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F15%3A10319428" target="_blank" >RIV/00216208:11320/15:10319428 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1039/c5cp00516g" target="_blank" >http://dx.doi.org/10.1039/c5cp00516g</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1039/c5cp00516g" target="_blank" >10.1039/c5cp00516g</a>

Result language
angličtina
Original language name
H/D exchange in reactions of OH- with D-2 and of OD- with H-2 at low temperatures
Original language description
Using a cryogenic linear 22-pole rf ion trap, rate coefficients for H/D exchange reactions of OH- with D-2 (1) and OD- with H-2 (2) have been measured at temperatures between 11 K and 300 K with normal hydrogen. Below 60 K, we obtained k(1) = 5.5 x 10(-10) cm(3) s(-1) for the exoergic reaction (1). Upon increasing the temperature above 60 K, the data decrease with a power law, k(1)(T) similar to T-2.7, reaching approximate to 1 x 10(-10) cm(3) s(-1) at 200 K. This observation is tentatively explained with a decrease of the lifetime of the intermediate complex as well as with the assumption that scrambling of the three hydrogen atoms is restricted by the topology of the potential energy surface. The rate coefficient for the endoergic reaction (2) increases with temperature from 12 K up to 300 K, following the Arrhenius equation, k(2) = 7.5 x 10(-11) exp(-92 K/T) cm(3) s(-1) over two orders of magnitude. The fitted activation energy, EA-Exp = 7.9 meV, is in perfect accordance with the en
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BL - Plasma physics and discharge through gases
OECD FORD branch
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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