Direct Measurements of Conformer-Dependent Reactivity of the Criegee Intermediate CH 3 CHOO

Abstract

More Criegee Sightings The reaction of ozone with unsaturated hydrocarbons produces short-lived molecules termed Criegee intermediates. The simplest such molecule, H 2 CO 2 , was recently detected and monitored in the laboratory. Su et al. (p. 174 ; see the Perspective by Vereecken ) have obtained its vibrational spectrum, which could ultimately enable direct measurements of its reactivity in the atmosphere. Taatjes et al. (p. 177 ; see the Perspective by Vereecken ) report on the laboratory preparation and reactivity of the next heavier Criegee intermediate, which bears a methyl group in place of one of the hydrogen atoms.