{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"submitter":["Peltola J"],"funding":["Research Council of Finland","Helsingin Yliopisto"],"pagination":["5331-5336"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC11389976"],"repository":["biostudies-literature"],"omics_type":["Unknown"],"volume":["15(20)"],"pubmed_abstract":["We report the first direct kinetic measurements of a cyclic stabilized Criegee Intermediate. We have measured the unimolecular reaction rate coefficient of cyclohexanone oxide (<i>c-</i>(CH<sub>2</sub>)<sub>5</sub>COO) in the temperature 213-296 K and pressure 7-50 Torr ranges using absorption spectrometry. The <i>c-</i>(CH<sub>2</sub>)<sub>5</sub>COO was produced by the photolysis of <i>c-</i>(CH<sub>2</sub>)<sub>5</sub>CIBr at 213 nm in the presence of O<sub>2</sub>. We compare the measured fast <i>c-</i>(CH<sub>2</sub>)<sub>5</sub>COO unimolecular rate coefficient, 1998 ± 147 s<sup>-1</sup> at 296 K, with the literature calculations for the structurally similar <i>E</i>-nopinone oxide formed in β-pinene ozonolysis. The <i>k</i><sub>uni</sub>(<i>c-</i>(CH<sub>2</sub>)<sub>5</sub>COO)/<i>"],"journal":["The journal of physical chemistry letters"],"pubmed_title":["Direct Kinetic Measurements of a Cyclic Criegee Intermediate; Unimolecular Decomposition of <i>c-</i>(CH<sub>2</sub>)<sub>5</sub>COO."],"pmcid":["PMC11389976"],"funding_grant_id":["346374","298910"],"pubmed_authors":["Heinonen P","Peltola J","Eskola A"],"additional_accession":[]},"is_claimable":false,"name":"Direct Kinetic Measurements of a Cyclic Criegee Intermediate; Unimolecular Decomposition of <i>c-</i>(CH<sub>2</sub>)<sub>5</sub>COO.","description":"We report the first direct kinetic measurements of a cyclic stabilized Criegee Intermediate. We have measured the unimolecular reaction rate coefficient of cyclohexanone oxide (<i>c-</i>(CH<sub>2</sub>)<sub>5</sub>COO) in the temperature 213-296 K and pressure 7-50 Torr ranges using absorption spectrometry. The <i>c-</i>(CH<sub>2</sub>)<sub>5</sub>COO was produced by the photolysis of <i>c-</i>(CH<sub>2</sub>)<sub>5</sub>CIBr at 213 nm in the presence of O<sub>2</sub>. We compare the measured fast <i>c-</i>(CH<sub>2</sub>)<sub>5</sub>COO unimolecular rate coefficient, 1998 ± 147 s<sup>-1</sup> at 296 K, with the literature calculations for the structurally similar <i>E</i>-nopinone oxide formed in β-pinene ozonolysis. The <i>k</i><sub>uni</sub>(<i>c-</i>(CH<sub>2</sub>)<sub>5</sub>COO)/<i>","dates":{"release":"2024-01-01T00:00:00Z","publication":"2024 May","modification":"2025-04-04T02:54:10.249Z","creation":"2025-04-04T02:54:10.249Z"},"accession":"S-EPMC11389976","cross_references":{"pubmed":["38727747"],"doi":["10.1021/acs.jpclett.4c00554"]}}