Kinetic Isotope Effects in Multipath VTST: Application to a Hydrogen Abstraction Reaction
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Title: | Kinetic Isotope Effects in Multipath VTST: Application to a Hydrogen Abstraction Reaction |
Author: | Simón-Carballido, Luis Alves, Tiago Vinicius Dybala-Defratyka, Agnieszka Fernández-Ramos, Antonio |
Affiliation: | Universidade de Santiago de Compostela. Centro de Investigación en Química Biolóxica e Materiais Moleculares Universidade de Santiago de Compostela. Departamento de Química Física |
Date of Issue: | 2016 |
Publisher: | American Chemical Society |
Citation: | Simón-Carballido, L., Alves, T., Dybala-Defratyka, A., & Fernández-Ramos, A. (2016). Kinetic Isotope Effects in Multipath VTST: Application to a Hydrogen Abstraction Reaction. The Journal Of Physical Chemistry B, 120(8), 1911-1918. doi: 10.1021/acs.jpcb.5b09671 |
Abstract: | In this work we apply multipath canonical variational transition state theory with small-tunneling corrections (MP-CVT/SCT) to the hydrogen abstraction reaction from ethanol by atomic hydrogen in aqueous solution at room temperature. This reaction presents two transition states which can interconvert by internal rotations about single bonds and another two transition states that are non-interconvertible enantiomers to the former structures. The study also includes another three reactions with isotopically substituted species for which there are experimental values of thermal rate constants and kinetic isotope effects (KIEs). The agreement between the MP-CVT/SCT thermal rate constants and the experimental data is good. The KIEs obtained by the MP-CVT/SCT methodology are factorized in terms of individual transition state contributions to facilitate the analysis. It was found that the percentage contribution of each transition state to the total KIE is independent of the isotopic substitution |
Publisher version: | https://doi.org/10.1021/acs.jpcb.5b09671 |
URI: | http://hdl.handle.net/10347/16913 |
DOI: | 10.1021/acs.jpcb.5b09671 |
ISSN: | 1520-6106 |
E-ISSN: | 1520-5207 |
Rights: | © 2016 American Chemical Society |
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