[en] Access to molecular parameters of intermolecular reactions in the condensed phase is usually masked by thermal activation or diffusional processes in the molecular ensemble. However, the reaction kinetics of electron transfer can be influenced by the charge transfer itself and diffusion if the reaction occurs at distances longer than contact distance of the reactants. For sufficient high concentration of one of the reactants this leads to a deviation from exponential kinetics. From the analysis of this so-called transient effect, important reaction parameters can be retrieved and can lead to a microscopic picture of bimolecular electron transfer reactions. Up to now, the transient effect was studied for photo-induced electron transfer and observed by fluorescence quenching. Here we present electron-pulse-pump / super-continuum-probe measurements of the ground state electron transfer between the solvated electron e_s"- and highly concentrated Cu"2"+, Pb"2"+ and Ni"2"+ in the viscous solvent ethylene glycol (EG). The transient absorption setup was installed at the experimental area EA-1 of the facility ELYSE. The decay of the e_s"- population obtained by the picosecond pulse-radiolysis measurements is fitted by a theoretical decay function based on a time-dependent diffusion equation including a distance-dependent reaction rate. By this, reaction rates and distance distributions can be derived for the first time from experimental data for the highly reactive reducing agent e_s"-. The data and its analysis reveal that long range electron transfer is possible and that a barrier-less reaction of e_s"- does not necessarily occur at contact. The distribution of reaction distance strongly depends on the free enthalpy change of the reactions. So for the reaction of Ni"2"+ with the lowest studied free enthalpy change almost no transient effect was revealed. The very exothermic Cu"2"+ system presents the strongest transient effect. In that case, the reaction between the solvated electron and copper can occur at long distance in the order of 10 A. (authors)