The primary stages of polyoxomolybdate catalyzed cyclohexanone oxidation by hydrogen peroxide as investigated by in situ NMR. Substrate activation and evolution of the working catalyst
Review articleOpen access
Abstract:

Highlights•In situ NMR spectroscopy was employed to monitor oxidative conversion of cyclohexanone by hydrogen peroxide and Keggin-type phosphomolybdates.•UV-Vis spectroscopy was used to identify the various reduced and oxidized phosphomolybdate species.•Activation of the substrate via ketonic-enolic tautomerism was evidenced as the primary step.•Peroxomolybdate-type complexes were identified as active species for oxidation process.

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