Adiabatic capture theory applied to N+NH→N2+H at low temperature

The adiabatic capture centrifugal sudden approximation (ACCSA) has been applied to the ground state reaction N + NH -> N-2 + H over the temperature range 2-300 K using an existent potential energy surface. The resultant thermal rate constants are in agreement with available rate constants from quasi-classical trajectory calculations but are significantly larger than the available experimentally derived rate. The calculated rate constants monotonically increase with increasing temperature but could only be approximately described with a simple Arrhenius-like form. Subtle quantum effects are evident in the initial rotational state resolved cross sections and rate constants.