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The influence of fluorination on the dynamics of the F(−) + CH(3)CH(2)I reaction
The competition between the bimolecular nucleophilic substitution (S(N)2) and base-induced elimination (E2) reaction and their intrinsic reactivity is of key interest in organic chemistry. To investigate the effect of suppressing the E2 pathway on S(N)2 reactivity, we compared the reactions F(−) + C...
Autores principales: | , , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society of Chemistry
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10355169/ https://www.ncbi.nlm.nih.gov/pubmed/37409391 http://dx.doi.org/10.1039/d3cp02110f |
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author | Gstir, Thomas Michaelsen, Tim Long, Bryan A. Nacsa, András B. Ayasli, Atilay Swaraj, Dasarath Zappa, Fabio Trummer, Florian Ard, Shaun G. Shuman, Nicholas S. Czakó, Gábor Viggiano, Albert A. Wester, Roland |
author_facet | Gstir, Thomas Michaelsen, Tim Long, Bryan A. Nacsa, András B. Ayasli, Atilay Swaraj, Dasarath Zappa, Fabio Trummer, Florian Ard, Shaun G. Shuman, Nicholas S. Czakó, Gábor Viggiano, Albert A. Wester, Roland |
author_sort | Gstir, Thomas |
collection | PubMed |
description | The competition between the bimolecular nucleophilic substitution (S(N)2) and base-induced elimination (E2) reaction and their intrinsic reactivity is of key interest in organic chemistry. To investigate the effect of suppressing the E2 pathway on S(N)2 reactivity, we compared the reactions F(−) + CH(3)CH(2)I and F(−) + CF(3)CH(2)I. Differential cross-sections have been measured in a crossed-beam setup combined with velocity map imaging, giving insight into the underlying mechanisms of the individual pathways. Additionally, we employed a selected-ion flow tube to obtain reaction rates and high-level ab initio computations to characterize the different reaction pathways and product channels. The fluorination of the β-carbon not only suppresses the E2-reaction but opens up additional channels involving the abstraction of fluorine. The overall S(N)2 reactivity is reduced compared to the non-fluorinated iodoethane. This reduction is presumably due to the competition with the highly reactive channels forming FHF(−) and CF(2)CI(−). |
format | Online Article Text |
id | pubmed-10355169 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | The Royal Society of Chemistry |
record_format | MEDLINE/PubMed |
spelling | pubmed-103551692023-07-20 The influence of fluorination on the dynamics of the F(−) + CH(3)CH(2)I reaction Gstir, Thomas Michaelsen, Tim Long, Bryan A. Nacsa, András B. Ayasli, Atilay Swaraj, Dasarath Zappa, Fabio Trummer, Florian Ard, Shaun G. Shuman, Nicholas S. Czakó, Gábor Viggiano, Albert A. Wester, Roland Phys Chem Chem Phys Chemistry The competition between the bimolecular nucleophilic substitution (S(N)2) and base-induced elimination (E2) reaction and their intrinsic reactivity is of key interest in organic chemistry. To investigate the effect of suppressing the E2 pathway on S(N)2 reactivity, we compared the reactions F(−) + CH(3)CH(2)I and F(−) + CF(3)CH(2)I. Differential cross-sections have been measured in a crossed-beam setup combined with velocity map imaging, giving insight into the underlying mechanisms of the individual pathways. Additionally, we employed a selected-ion flow tube to obtain reaction rates and high-level ab initio computations to characterize the different reaction pathways and product channels. The fluorination of the β-carbon not only suppresses the E2-reaction but opens up additional channels involving the abstraction of fluorine. The overall S(N)2 reactivity is reduced compared to the non-fluorinated iodoethane. This reduction is presumably due to the competition with the highly reactive channels forming FHF(−) and CF(2)CI(−). The Royal Society of Chemistry 2023-06-21 /pmc/articles/PMC10355169/ /pubmed/37409391 http://dx.doi.org/10.1039/d3cp02110f Text en This journal is © the Owner Societies https://creativecommons.org/licenses/by/3.0/ |
spellingShingle | Chemistry Gstir, Thomas Michaelsen, Tim Long, Bryan A. Nacsa, András B. Ayasli, Atilay Swaraj, Dasarath Zappa, Fabio Trummer, Florian Ard, Shaun G. Shuman, Nicholas S. Czakó, Gábor Viggiano, Albert A. Wester, Roland The influence of fluorination on the dynamics of the F(−) + CH(3)CH(2)I reaction |
title | The influence of fluorination on the dynamics of the F(−) + CH(3)CH(2)I reaction |
title_full | The influence of fluorination on the dynamics of the F(−) + CH(3)CH(2)I reaction |
title_fullStr | The influence of fluorination on the dynamics of the F(−) + CH(3)CH(2)I reaction |
title_full_unstemmed | The influence of fluorination on the dynamics of the F(−) + CH(3)CH(2)I reaction |
title_short | The influence of fluorination on the dynamics of the F(−) + CH(3)CH(2)I reaction |
title_sort | influence of fluorination on the dynamics of the f(−) + ch(3)ch(2)i reaction |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10355169/ https://www.ncbi.nlm.nih.gov/pubmed/37409391 http://dx.doi.org/10.1039/d3cp02110f |
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