Question

The correct structure of C is

• A.
• B.
• C.
• D.

Answer 1

The Correct Option is A

 To determine the correct structure of compound C in the given reaction sequence, we need to follow the steps involved in each chemical transformation.

1. **Reaction with Grignard Reagent**:

The starting compound is CH₃-CH₂-CN, which is a nitrile. When it reacts with the Grignard reagent CH₃MgBr in the presence of ether, the Grignard reagent attacks the carbon of the CN group, converting it into a ketone. The product A is therefore CH₃-CH₂-C(CH₃=O).

2. **Hydrolysis**:

Next, compound A undergoes hydrolysis with H₃O⁺ to yield a ketone B. However, since compound A is already in the form of a ketone, it remains unchanged at this step.

3. **Clemmensen Reduction**:

The final step involves Zn-Hg and HCl, which is a Clemmensen reduction. This process reduces the carbonyl (C=O) group in compound B to yield an alkane. Thus, compound C is CH₃-CH₂-C(CH₃)-H.

The correct structure of compound C, therefore, is the one that represents this alkane.

This matches the structure from the given option, confirming it as the correct answer for compound C.

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