Rate constants for the reaction D+H2=DH+H at low temperatures using ESR detection

The reaction D+H2=DH+H has been studied in the temperature range 167–346°K. The results, which include measurements at considerably lower temperatures than previously employed, are in good agreement at the higher temperatures with those of other workers. A slight amount of curvature is observed in the Arrhenius plot, although less than previously measured. An empirical fit to the results, which also agrees with the previous high temperature data, is k3=(1.64 ± 0.10) × 107 T2exp[(−5360 ± 40)/ RT] cc/mole· sec. sec.