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Structural, thermochemical and kinetic insights on the pyrolysis of diketene to produce ketene
Diketene (4-methylideneoxetan-2-one) is a precursor to the formation of either two molecules of ketene, or allene and CO(2) using pyrolysis techniques. It is not known experimentally which of these pathways is followed, or indeed if both are, during the dissociation process. We use computational met...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Springer Berlin Heidelberg
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10156866/ https://www.ncbi.nlm.nih.gov/pubmed/37133582 http://dx.doi.org/10.1007/s00894-023-05572-x |
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author | Poudel, Pitambar Masters, Sarah L. |
author_facet | Poudel, Pitambar Masters, Sarah L. |
author_sort | Poudel, Pitambar |
collection | PubMed |
description | Diketene (4-methylideneoxetan-2-one) is a precursor to the formation of either two molecules of ketene, or allene and CO(2) using pyrolysis techniques. It is not known experimentally which of these pathways is followed, or indeed if both are, during the dissociation process. We use computational methods to show that the formation of ketene has a lower barrier than formation of allene and CO(2) under standard conditions (by 12 kJ/mol). According to CCSD(T)/CBS, CBS-QB3 and M06-2X/cc-pVTZ calculations the formation of allene and CO(2) is favoured thermodynamically under standard conditions of temperature and pressure; however, kinetically the formation of ketene is favoured from transition state theory calculations at standard and elevated temperatures. GRAPHICAL ABSTRACT: [Image: see text] SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1007/s00894-023-05572-x. |
format | Online Article Text |
id | pubmed-10156866 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | Springer Berlin Heidelberg |
record_format | MEDLINE/PubMed |
spelling | pubmed-101568662023-05-05 Structural, thermochemical and kinetic insights on the pyrolysis of diketene to produce ketene Poudel, Pitambar Masters, Sarah L. J Mol Model Original Paper Diketene (4-methylideneoxetan-2-one) is a precursor to the formation of either two molecules of ketene, or allene and CO(2) using pyrolysis techniques. It is not known experimentally which of these pathways is followed, or indeed if both are, during the dissociation process. We use computational methods to show that the formation of ketene has a lower barrier than formation of allene and CO(2) under standard conditions (by 12 kJ/mol). According to CCSD(T)/CBS, CBS-QB3 and M06-2X/cc-pVTZ calculations the formation of allene and CO(2) is favoured thermodynamically under standard conditions of temperature and pressure; however, kinetically the formation of ketene is favoured from transition state theory calculations at standard and elevated temperatures. GRAPHICAL ABSTRACT: [Image: see text] SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1007/s00894-023-05572-x. Springer Berlin Heidelberg 2023-05-03 2023 /pmc/articles/PMC10156866/ /pubmed/37133582 http://dx.doi.org/10.1007/s00894-023-05572-x Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Original Paper Poudel, Pitambar Masters, Sarah L. Structural, thermochemical and kinetic insights on the pyrolysis of diketene to produce ketene |
title | Structural, thermochemical and kinetic insights on the pyrolysis of diketene to produce ketene |
title_full | Structural, thermochemical and kinetic insights on the pyrolysis of diketene to produce ketene |
title_fullStr | Structural, thermochemical and kinetic insights on the pyrolysis of diketene to produce ketene |
title_full_unstemmed | Structural, thermochemical and kinetic insights on the pyrolysis of diketene to produce ketene |
title_short | Structural, thermochemical and kinetic insights on the pyrolysis of diketene to produce ketene |
title_sort | structural, thermochemical and kinetic insights on the pyrolysis of diketene to produce ketene |
topic | Original Paper |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10156866/ https://www.ncbi.nlm.nih.gov/pubmed/37133582 http://dx.doi.org/10.1007/s00894-023-05572-x |
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