Atmospheric chemistry of cyclohexanone: UV spectrum and kinetics of reaction with chlorine atoms

Absolute and relative rate techniques were used to study the reactivity of Cl atoms with cyclohexanone in 6 Torr of argon or 800-950 Torr of N₂ at 295 ± 2 K. The absolute rate experiments gave k(Cl + cyclohexanone) = (1.88 ± 0.38) × 10^-10, whereas the relative rate experiments gave k[Cl + cyclohexanone) = (1.66 ± 0.26) × 10 ^-10 cm³ molecule^-1 s^-1. Cyclohexanone has a broad UV absorption band with a maximum cross section of (4.0 ± 0.3) × 10^-20 cm² molecule^-1 near 285 nm. The results are discussed with respect to the literature data.