The reactivity of the pair formed by magnesium perchlorate with solvated electron in THF with aromatic molecules and halogenated hydrocarbons was investigated by pulse radiolysis. The kinetics of electron transfer from the pair to aromatic molecules with reduction potentials covering a I V range were recorded. The corresponding rate constants were determined and show that the pair presents a strong reducing character because it can reduce biphenyl which has a low redox potential. Nevertheless, the pair is still a weaker reducing agent than the solvated electron in THF. Moreover, we estimated the rate constants of the reaction between the pair and different types of alkyl halogenides.