Abstract
The total rate constant for the reaction H + IBr → HI + Br*(Br), HBr + I* (1). (1.5±0.04)×10 −10 cm 3/s has been obtained at room temperature. The reaction path leading to bromine-atom formation was found to be predominant (≈90%). Our results together with data on the rate constants for the H-atom reactions with halogen and interhalogen (two branches) molecules, show that the rate constants to such reactions are determined exclusively by H-atom interaction with the attacked halogen atom and are nearly independent of the other halogen in the molecule. The rate constants for the Br *( 2P sol1 2 collisional deactivation by H 2S and CF 3Br have been measured as (6.2±1.6)×10 −13 cm 3/s, respectively.
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