Direct Kinetic Measurements of a Cyclic Criegee Intermediate; Unimolecular Decomposition of c-(CH₂)₅COO.

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 (c-(CH₂)₅COO) in the temperature 213-296 K and pressure 7-50 Torr ranges using absorption spectrometry. The c-(CH₂)₅COO was produced by the photolysis of c-(CH₂)₅CIBr at 213 nm in the presence of O₂. We compare the measured fast c-(CH₂)₅COO unimolecular rate coefficient, 1998 ± 147 s^-1 at 296 K, with the literature calculations for the structurally similar E-nopinone oxide formed in β-pinene ozonolysis. The k_uni(c-(CH₂)₅COO)/

SUBMITTER: Peltola J 

PROVIDER: S-EPMC11389976 | biostudies-literature | 2024 May

REPOSITORIES: biostudies-literature