Q42 / 150 · MHT CET 2026 (13 April Shift 1) · Chemistry
Identify the reagent used in Etard reaction
- AAcetic anhydride
- BAnhydrous aluminum chloride
- CDIBAL-H
- Correct answerDChromyl chloride
Solution
The Etard reaction involves the oxidation of a methyl group attached to an aromatic ring (such as toluene) to an aldehyde group (such as benzaldehyde).
The reagent used for this specific transformation is chromyl chloride ($CrO_2Cl_2$) in a non-polar solvent like $CS_2$ or $CCl_4$, followed by hydrolysis.
The reaction proceeds via the formation of a brown chromium complex, which upon decomposition with water yields the corresponding aldehyde.
Answer: Chromyl chloride
The reagent used for this specific transformation is chromyl chloride ($CrO_2Cl_2$) in a non-polar solvent like $CS_2$ or $CCl_4$, followed by hydrolysis.
The reaction proceeds via the formation of a brown chromium complex, which upon decomposition with water yields the corresponding aldehyde.
Answer: Chromyl chloride
Hence, the correct answer is option: 'D'.