Question:
Identify the functional group Y in the end product of the reaction sequence?
Identify the functional group Y in the end product of the reaction sequence?
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Aromatic side chains containing benzylic hydrogen are readily oxidized to carboxylic acids.
Updated On: Jun 28, 2026
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The Correct Option is C
Solution and Explanation
Step 1: Formation of aromatic compound A.
Heptane undergoes aromatization in the presence of \(MoO_3\). \[ C_7H_{16} \longrightarrow C_6H_5CH_3 \] Therefore, \[ A=\text{Toluene} \]
Step 2: Oxidation using chromic oxide in acetic anhydride.
This converts the methyl group of toluene into benzaldehyde. \[ C_6H_5CH_3 \longrightarrow C_6H_5CHO \]
Step 3: Hydrolysis and further oxidation.
The aldehyde formed is ultimately converted into benzoic acid. \[ C_6H_5CHO \longrightarrow C_6H_5COOH \] Hence Y contains the carboxylic acid functional group. \[ \boxed{-COOH} \] \[ \boxed{\text{Answer = (C)}} \]
Heptane undergoes aromatization in the presence of \(MoO_3\). \[ C_7H_{16} \longrightarrow C_6H_5CH_3 \] Therefore, \[ A=\text{Toluene} \]
Step 2: Oxidation using chromic oxide in acetic anhydride.
This converts the methyl group of toluene into benzaldehyde. \[ C_6H_5CH_3 \longrightarrow C_6H_5CHO \]
Step 3: Hydrolysis and further oxidation.
The aldehyde formed is ultimately converted into benzoic acid. \[ C_6H_5CHO \longrightarrow C_6H_5COOH \] Hence Y contains the carboxylic acid functional group. \[ \boxed{-COOH} \] \[ \boxed{\text{Answer = (C)}} \]
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