The interaction between the ion-dipole and the ion-induced-dipole in reactions of the polar ion ArH3+

The reactions of the highly polar ion ArH3+ with the non polar neutrals Xe, Kr, CH4, CO, NO, O2, D2 and N2 and with the polar neutrals SO2, H2O, NH3, CH3I, and C2H5I have been investigated in a Selected Ion Flow Drift Tube experiment at near thermal conditions. The rate coefficients obtained have typically 15-40 percent larger values than the collisional limiting values kL and kADO obtained by the Langevin- and ADO (Average Dipole Orientation) theory respectively. These data are explained on the basis of the interaction between the dipole of ArH3+ and the ion-induced-dipole and the permanent dipole respectively of the neutral reactants. (author)