Question

In the Etard reaction, the final product is

• A. Aromatic aldehyde
• B. Aromatic chloride
• C. Aromatic amine
• D. Aromatic alcohol

Answer 1

The Correct Option is A

The Etard reaction is an organic chemical reaction that transforms aromatic hydrocarbons, particularly aromatic methyl groups, into aromatic aldehydes. The process involves the oxidation of the methyl group attached to the aromatic ring using chromyl chloride (CrO₂Cl₂) in the presence of a solvent such as carbon tetrachloride (CCl₄). 

The key steps of the Etard reaction are as follows:

1. The aromatic hydrocarbon reacts with chromyl chloride to form a complex.
2. Upon hydrolysis of this complex, an aromatic aldehyde is produced.

This reaction is significant because it offers a method to directly oxidize a side-chain methyl group on an aromatic ring to form an aldehyde without further oxidation to a carboxylic acid. As a result, the final product of the Etard reaction is an aromatic aldehyde.

Therefore, the correct answer is: Aromatic aldehyde

Answer 2

The Étard reaction is a chemical reaction that oxidizes an aromatic methyl group to an aldehyde using chromyl chloride (CrO₂Cl₂).

Here's a breakdown of the reaction:

An aromatic compound with a methyl group (like toluene) reacts with chromyl chloride (CrO₂Cl₂) in carbon tetrachloride (CCl₄) or carbon disulfide (CS₂) as a solvent. The reaction forms a chromium complex, which is then hydrolyzed to produce an aromatic aldehyde.

For example, the reaction of toluene with chromyl chloride gives benzaldehyde:

C₆H₅CH₃ + 2CrO₂Cl₂ → C₆H₅CH(OCrOHCl₂)₂ → C₆H₅CHO

Therefore, the final product of the Étard reaction is an aromatic aldehyde.

Let's analyze the given options:

• Option 1: Aromatic aldehyde: This is the correct product.
• Option 2: Aromatic chloride: This is incorrect.
• Option 3: Aromatic amine: This is incorrect.
• Option 4: Aromatic alcohol: This is incorrect.

The correct answer is  (A) : Aromatic aldehyde