Rate constants for the reactions of O−, O2−, NO2−, CO3−, and CO4− with HCl and ClO− with NO, NO2, SO2, and CO2 at 300 K

The rate constants for several ion–molecule reactions involving chlorine-containing ions or molecules have been measured at 300 K with a flowing afterglow apparatus. These include the reaction of O− with CCl4, several negative ions with HCl, ClO− with several neutrals, and Cl− with O3. These reactions are used to place limits on the electron affinity of ClO: E.A.(ClO) =1.95±0.25 eV. The implications of these results to the negative ion chemistry of the atmosphere are discussed.