In the given reactions identify the reagent A and reagent B
- \( A-\text{CrO}_3 \quad B-\text{CrO}_3\)
- \(A-\text{CrO}_3 \quad B-\text{CrO}_2\text{Cl}_2\)
- \(A-\text{CrO}_2\text{Cl}_2 \quad B-\text{CrO}_2\text{Cl}_2\)
- \(A-\text{CrO}_2\text{Cl}_2 \quad B-\text{CrO}_3\)
The Correct Option is B
Solution and Explanation
Step 1: The reaction starts with toluene, which is oxidized by reagent A (CrO3) in acetic anhydride (CH3CO)2O. This oxidation step is known as the Etard reaction, where toluene is converted into benzylidene diacetate as an intermediate.
Step 2: The intermediate benzylidene diacetate is then treated with reagent B (CrO2Cl2), followed by hydrolysis (H2O+) to yield benzaldehyde (C6H5CHO).
Thus, the correct reagents are A-CrO3 and B-CrO2Cl2, which is represented by option (2).
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