[C:1]1(=[O:7])[CH2:6][CH2:5][CH2:4]CC1.[N+]([O-])(O)=O.[O:12]=O.[C:14]([OH:17])(=[O:16])[CH3:15]>[N+]([O-])([O-])=O.[Mn+2].[N+]([O-])([O-])=O.[N+]([O-])([O-])=O.[Co+2].[N+]([O-])([O-])=O>[C:1]([OH:7])(=[O:12])[CH2:6][CH2:5][CH2:4][CH2:15][C:14]([OH:17])=[O:16]A solution containing 25 mmol of cyclohexanone, 0.5 mmol of manganese(II) nitrate, 0.5 mmol of cobalt(II) nitrate and 1.5 mmol of nitric acid in 25 ml of acetic acid was stirred for 5 h at 40° C. in an oxygen atmosphere under ambient pressure. Subsequently, the acetic acid was distilled off. The residue was found to consist mainly of adipic acid with some glutaric acid and a small amount of unreacted starting material. The conversion of cyclo-hexanone was found to be 97.5%, the selectivity of the oxidation to adipic acid being 93.4%.
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