A requisite quantity of μ-peroxo-bis[aminebis(ethylenediamine)cobalt(III)]perchlorate dihydrate was prepared by solution route method. Complex characterization was done by using FT-IR and electronic spectroscopy. Kinetic Oxidations of L-glutamine by μ-peroxo complex has been deliberated in an aqueous medium. The reaction rate measurements were carried out under pseudo first order conditions. The effect of peroxo complex and effect of hydrogen ion concentration shows first order kinetics in the oxidation reaction. Change in the concentration of ionic strength has no effect on the reaction rate during the oxidation. Kinetic measurement was carried out by potentiometric method. Activation and thermodynamics parameters were calculated and a suitable mechanism has been proposed.