American Meteorological Society - Glossary of Meteorology

Criegee intermediate

  1. Proposed intermediate in the ozonolysis of ethylene, formula ·CH2OO·, formally a biradical species, which has two free radical sites.
  2. Family of biradicals formed from the reaction of ozone with alkenes in the atmosphere. The yields of Criegee intermediates, and their subsequent reactions, are not fully characterized.