Rate constants and products for the reaction of HBr+ with HBr and DBr

The proton transfer channel for the reaction of HBr+ with HBr is investigated in a state-specific manner by preparing the reagent ion in a selected internal state by resonance-enhanced ionization (REMPI) and monitoring the disappearance of this ion by laser-induced fluorescence (LIF). A rate constant for proton transfer of (6.7 ± 1.6) × 10−10 cm3/s is found. The reaction of HBr+ with HBr and DBr was also studied in a selected ion flow tube. The reactions were found to be quite complex producing charge transfer, proton transfer, and hydrogen transfer products. The rate constants are (5.3 ± 1.3) × 10−10 cm3/s for the removal of HBr+ by HBr and DBr neutrals.