Question:
Identify the reagent used in Etard reaction.
Identify the reagent used in Etard reaction.
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The Etard reaction converts toluene to benzaldehyde using a chromium reagent.
Updated On: Nov 12, 2026
- \(\text{SnCl}_{2}\text{.HCl}\)
- \(\text{CrO}_{3}\)
- \(\text{Pd-BaSO}_{4}\)
- \(\text{CrO}_{2}\text{Cl}_{2}\)
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The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept
The Etard reaction oxidises the methyl group of toluene to an aldehyde group.
Step 2: Reagent
Chromyl chloride, \(\text{CrO}_2\text{Cl}_2\), is used in a solvent such as \(\text{CS}_2\) or \(\text{CCl}_4\), followed by hydrolysis.
Step 3: Match
This is the last option.
Final Answer:
The Etard reaction uses chromyl chloride, \(\text{CrO}_2\text{Cl}_2\). \[ \boxed{\text{(D) }\text{CrO}_{2}\text{Cl}_{2}} \]
The Etard reaction oxidises the methyl group of toluene to an aldehyde group.
Step 2: Reagent
Chromyl chloride, \(\text{CrO}_2\text{Cl}_2\), is used in a solvent such as \(\text{CS}_2\) or \(\text{CCl}_4\), followed by hydrolysis.
Step 3: Match
This is the last option.
Final Answer:
The Etard reaction uses chromyl chloride, \(\text{CrO}_2\text{Cl}_2\). \[ \boxed{\text{(D) }\text{CrO}_{2}\text{Cl}_{2}} \]
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