ChemInform Abstract: Temperature Dependence of the Rate Constant and Product Channels for the BrO + ClO Reaction.

Abstract

The rate constant of the title reaction is measured over the temp. range 241‐408 K under pseudo‐first‐order conditions, ((ClO) ≫ (BrO)), using discharge‐flow mass spectrometry.

Stratospheric Chemistry

“…The catalytic reaction cycle involving both chlorine and bromine [ McElroy et al ., 1986a; Tung et al ., 1986; Rodriguez et al ., 1986] requires BrO and ClO to react to form ClOO + Br or BrCl + O 2 , whereas a third exothermic channel, Br + OClO, exists. The laboratory studies of Friedl and Sander [1989], Sander and Friedl [1989], Toohey and Anderson [1988a], and Poulet et al [1990] achieve reasonable agreement in the rate constant, temperature dependence (from the first two studies), and branching ratios into the OClO and BrCl channels, although studies by Hills et al . 1988] are in disagreement with the other studies.…”