Production of Cl2O2 from the Self-Reaction of the ClO Radical

Article abstract of DOI:10.1021/j100286a035

The species Cl2O2 has been generated in gaseous flow system at 220-240 K by reacting Cl atoms with one of three different ClO precursors: O3, Cl2O, or OClO.The infrared spectra of the reactive mixture indicate that the least two different dimers are produced: a predominant form with bands centered at 1225 and 1057 cm^-1 attributed to ClOOCl, and a second form with a band at 650 cm^-1 attributed to ClOClO.The UV spectrum of the predominant form shows a maximum adsorption cross section of ca.6.5 x 1E-18 cm^-1/molecule around 720 nm, with a wing extending beyond 300 nm.The implications of these results for the chemistry of the stratosphere are discussed.