The rate of the reaction if found to be directly proportional to the concentrations of H,+ benzaldehyde and MnO4. Benzaldehyde (C6H5CHO) is oxidized to benzoic acid by potassium permanganate in acid medium. When the oxidation is carried out with (C6H5CDO), the rate is much slower than with (C6H5CHO). Oxidation of (C6H5CHO) in MnO4- and H2O18 gives the product (C6H5COOH) whereas the same reaction in the presence of Mn18O4- gave benzoic acid containing 18O. How can write a reasonable mechanism for this oxidation reaction that is consistent with these observed facts.