Parametrization of kinetic energy dependences of ion–polar molecule collision rate constants by trajectory calculations

Kinetic energy dependences of ion–polar molecule capture rate constants have been calculated using the trajectory method at varies temperatures. An empirical equation was formulated to fit the calculated data. The parametrized equation gives rate constants within 5% error for re- lative kinetic energies ranging from thermal to several eV and temperatures ranging from 50 K to 1000 K.