Mechanism of cyclohexane oxidation by molecular oxygen in the biomimetic iron porphyrin system with proton and electron donors: II. A molecular pathway

The kinetics of the accumulation of cyclohexyl hydroperoxide, alcohol, and ketone during cyclohexane oxidation in an O-2/FeP/AcOH/Zn/CH3CN biomimetic system is studied by gas-liquid chromatography. The factors determining the selectivity of the nonradical oxidation pathway, which results in the form ation of more than 80% of the products, are considered. A scheme of the mol ecular pathway of alcohol and ketone formation is proposed, which agrees we ll with the experimental data. The kinetic parameters for cyclohexane oxida tion catalyzed by iron porphyrins with various substituents in the phenyl r ings in this system with and without an electron carrier (methylviologen) a re calculated.