Abstract A detailed mechanistic study of the epoxidation of alkenes by the cytochrome-P-450 model sodium hypochlorite/manganese (III) tetraarylporphyrin is presented. From the zero- order rate dependence on alkene concentration and low-temperature-trapping experiments with the hydrogen-atom donor 1, 1-diphenyl-2-picrylhydrazine (DPPH), it is concluded that the formation of the active [(P) MnO]+ species from a (P) MnOCl complex is the rate- ...
