Question

The reaction used to convert toluene to benzaldehyde is known as ______.

Options

• Etard’s reaction

• Gatterman-Koch formylation reaction

• Friedel-Crafts reaction

• Swartz reaction

Answer 1

The reaction used to convert toluene to benzaldehyde is known as Etard’s reaction.

Explanation:

Etard’s Reaction is used to oxidise toluene to benzaldehyde using chromyl chloride (CrO₂Cl₂).

Etard Reaction:

\[\ce{Tolune → Benzaldehyde}\]

Reagent: Chromyl chloride (CrO₂Cl₂)

This reaction selectively oxidises the methyl group (−CH₃) attached to the benzene ring into an aldehyde group (−CHO).