C6H5-CH2-OH + 2[O] --K2Cr2O7/H+--> C6H5-CH=O + H2O
alcool benzilic................................................... benzaldehida
CH3-CH(CH3)-CH2-OH + 3[O] --KMnO4/H+--> CH3-CH(CH3)-COOH + H2O
2-metil-1-butanol.......................................................... acid 2-metilbutanoic (butiric)