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How to prepare benzaldehyde from toluene

Accepted Answer
Benzaldehyde synthesis from toluene:

1. Oxidation of Toluene to Benzyl Alcohol: Toluene is oxidized using potassium permanganate (KMnO4) in an aqueous solution to form benzyl alcohol.

C6H5CH3 + 2 KMnO4 + H2O → C6H5CH2OH + 2 MnO2 + KOH

2. Dehydration of Benzyl Alcohol to Benzaldehyde: Benzyl alcohol is dehydrated using concentrated sulfuric acid (H2SO4) to form benzaldehyde.

C6H5CH2OH → C6H5CHO + H2O

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