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Benzoquinone from phenol

Phenol is oxidized to benzoquinone as

It is a oxidation reaction. The ready oxidation of phenol is explained by the fact that the presence of OH group on the benzene ring increases electron density to the ring due to resonance which makes it for oxidation reaction.

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OXIDATION OF PHENOL WITH CHROMIC ACID PRODUCES A COINUGATED DIKETONE KNOWN AS BENZOQUINONE

                  Na2Cr2O7, H2SO4

  PHENOL   ------------------------> BENZOQUINONE

 

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OXIDATION PHENOL WITH CHROMIC ACID ACID PRODUCES A CONJUGATED DIKETONE KNOWN AS BEZOQUINONE.IN PRESENCE OF AIR ,PHENOLS ARE SLOWLY OXIDIZED TO DARK COLOURED MOXTURES CONTAINING QUINONES.

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