Question

Chromyl chloride converts methyl group to a chromium complex, which on acid hydrolysis gives corresponding aldehyde. This reaction is called ____________.

Options

• Etard reaction

• Wolf-Kishner reaction

• Stephen reaction

• Rosenmund reaction

Answer 1

Chromyl chloride converts methyl group to a chromium complex, which on acid hydrolysis gives corresponding aldehyde. This reaction is called Etard reaction.

Explanation:

When toluene is treated with a solution of chromyl chloride (CrO₂Cl₂) in CS₂, brown chromium complex is obtained, which on acid hydrolysis gives benzaldehyde. This reaction is called the Etard reaction.