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

• DOI: 10.1126/science.1234689
• Publication Date: 2013-04-11T18:05:45Z
• Authors: Craig A. Taatjes; Oliver Welz; Arkke J. Eskola; John D. Savee; Adam M. Scheer; Dudley E. Shallcross; Brandon Rotavera; Edmond P. F. Lee; John M. Dyke; Daniel K. W. Mok; David L. Osborn; Carl J. Percival
• Keywords: 550; Chemie; SO2; VOLATILE ORGANIC-COMPOUNDS; OXIDATION; 540; 01 natural sciences; TROPOSPHERE; 0104 chemical sciences; SULFUR-DIOXIDE; CARBONYL OXIDES; CHEMISTRY; 13. Climate action; GAS-PHASE OZONOLYSIS; CH2OO; ACETALDEHYDE

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.