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Unimolecular Reactions of E-Glycolaldehyde Oxide and Its Reactions with One and Two Water Molecules

The kinetics of Criegee intermediates are important for atmospheric modeling. However, the quantitative kinetics of Criegee intermediates are still very limited, especially for those with hydroxy groups. Here, we calculate rate constants for the unimolecular reaction of E-glycolaldehyde oxide [E-hyd...

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Autores principales: Sun, Yan, Long, Bo, Truhlar, Donald G.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: AAAS 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10332847/
https://www.ncbi.nlm.nih.gov/pubmed/37435010
http://dx.doi.org/10.34133/research.0143
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author Sun, Yan
Long, Bo
Truhlar, Donald G.
author_facet Sun, Yan
Long, Bo
Truhlar, Donald G.
author_sort Sun, Yan
collection PubMed
description The kinetics of Criegee intermediates are important for atmospheric modeling. However, the quantitative kinetics of Criegee intermediates are still very limited, especially for those with hydroxy groups. Here, we calculate rate constants for the unimolecular reaction of E-glycolaldehyde oxide [E-hydroxyethanal oxide, E-(CH(2)OH)CHOO], for its reactions with H(2)O and (H(2)O)(2), and for the reaction of the E-(CH(2)OH)CHOO…H(2)O complex with H(2)O. For the highest level of electronic structure, we use W3X-L//CCSD(T)-F12a/cc-pVDZ-F12 for the unimolecular reaction and the reaction with water and W3X-L//DF-CCSD(T)-F12b/jun-cc-pVDZ for the reaction with 2 water molecules. For the dynamics, we use a dual-level strategy that combines conventional transition state theory with the highest level of electronic structure and multistructural canonical variational transition state theory with small-curvature tunneling with a validated density functional for the electronic structure. This dynamical treatment includes high-frequency anharmonicity, torsional anharmonicity, recrossing effects, and tunneling. We find that the unimolecular reaction of E-(CH(2)OH)CHOO depends on both temperature and pressure. The calculated results show that E-(CH(2)OH)CHOO…H(2)O + H(2)O is the dominant entrance channel, while previous investigations only considered Criegee intermediates + (H(2)O)(2). In addition, we find that the atmospheric lifetime of E-(CH(2)OH)CHOO with respect to 2 water molecules is particularly short with a value of 1.71 × 10(−6) s at 0 km, which is about 2 orders of magnitude shorter than those usually assumed for Criegee intermediate reactions with water dimer. We also find that the OH group in E-(CH(2)OH)CHOO enhances its reactivity.
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spelling pubmed-103328472023-07-11 Unimolecular Reactions of E-Glycolaldehyde Oxide and Its Reactions with One and Two Water Molecules Sun, Yan Long, Bo Truhlar, Donald G. Research (Wash D C) Research Article The kinetics of Criegee intermediates are important for atmospheric modeling. However, the quantitative kinetics of Criegee intermediates are still very limited, especially for those with hydroxy groups. Here, we calculate rate constants for the unimolecular reaction of E-glycolaldehyde oxide [E-hydroxyethanal oxide, E-(CH(2)OH)CHOO], for its reactions with H(2)O and (H(2)O)(2), and for the reaction of the E-(CH(2)OH)CHOO…H(2)O complex with H(2)O. For the highest level of electronic structure, we use W3X-L//CCSD(T)-F12a/cc-pVDZ-F12 for the unimolecular reaction and the reaction with water and W3X-L//DF-CCSD(T)-F12b/jun-cc-pVDZ for the reaction with 2 water molecules. For the dynamics, we use a dual-level strategy that combines conventional transition state theory with the highest level of electronic structure and multistructural canonical variational transition state theory with small-curvature tunneling with a validated density functional for the electronic structure. This dynamical treatment includes high-frequency anharmonicity, torsional anharmonicity, recrossing effects, and tunneling. We find that the unimolecular reaction of E-(CH(2)OH)CHOO depends on both temperature and pressure. The calculated results show that E-(CH(2)OH)CHOO…H(2)O + H(2)O is the dominant entrance channel, while previous investigations only considered Criegee intermediates + (H(2)O)(2). In addition, we find that the atmospheric lifetime of E-(CH(2)OH)CHOO with respect to 2 water molecules is particularly short with a value of 1.71 × 10(−6) s at 0 km, which is about 2 orders of magnitude shorter than those usually assumed for Criegee intermediate reactions with water dimer. We also find that the OH group in E-(CH(2)OH)CHOO enhances its reactivity. AAAS 2023-07-10 /pmc/articles/PMC10332847/ /pubmed/37435010 http://dx.doi.org/10.34133/research.0143 Text en Copyright © 2023 Yan Sun et al. https://creativecommons.org/licenses/by/4.0/Exclusive licensee Science and Technology Review Publishing House. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution License 4.0 (CC BY 4.0) (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Research Article
Sun, Yan
Long, Bo
Truhlar, Donald G.
Unimolecular Reactions of E-Glycolaldehyde Oxide and Its Reactions with One and Two Water Molecules
title Unimolecular Reactions of E-Glycolaldehyde Oxide and Its Reactions with One and Two Water Molecules
title_full Unimolecular Reactions of E-Glycolaldehyde Oxide and Its Reactions with One and Two Water Molecules
title_fullStr Unimolecular Reactions of E-Glycolaldehyde Oxide and Its Reactions with One and Two Water Molecules
title_full_unstemmed Unimolecular Reactions of E-Glycolaldehyde Oxide and Its Reactions with One and Two Water Molecules
title_short Unimolecular Reactions of E-Glycolaldehyde Oxide and Its Reactions with One and Two Water Molecules
title_sort unimolecular reactions of e-glycolaldehyde oxide and its reactions with one and two water molecules
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10332847/
https://www.ncbi.nlm.nih.gov/pubmed/37435010
http://dx.doi.org/10.34133/research.0143
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