Rate Constants for H +O2 + M at 298 K for M = He, N2, and H2O

Article abstract of DOI:10.1021/j100291a043

The rate constants of the three-body recombination reaction H + O2 + M (M = He, N2, H2O) were measured from 4.79 to 30.1 Torr at room temperature by the discharge-flow technique.The respective rate constants obtained are (2.6 +/- 0.2)E-32, (6.1 +/- 0.9)E-32, and (6.4 +/- 0.8)E-31 cm⁶s^-1.Although the rates for He and N2 can be rationalized in terms of existing theory, that for H2O implies a collision efficiency greater than 1.This situation can be rectified by use of the total quantum mechanical scattering cross section instead of the Lennard-Jones cross section commonly used.