The most suitable reagent for the following conversion is `"Benzamide "overset("Reagent")to` Benzylamine

Options

A. `Br_(2)+KOH`
B. `LiAlH_(4)`
C. `Conc.HNO_(3)`
D. Aqueous KOH

Answer

To convert benzamide to benzylamine, we need to perform a reduction reaction. Here’s a step-by-step solution to identify the most suitable reagent for this conversion:

### Step 1: Understand the Structures
- **Benzamide** has the structure:
\[ \text{C}_6\text{H}_5\text{C(O)NH}_2 \]
This contains a benzene ring attached to a carbonyl group (C=O) and an amine group (NH2).

- **Benzylamine** has the structure:
\[ \text{C}_6\text{H}_5\text{CH}_2\text{NH}_2 \]
This contains a benzene ring attached to a methylene group (CH2) and an amine group (NH2).

### Step 2: Identify the Reaction Type
The conversion from benzamide to benzylamine involves the reduction of the carbonyl (C=O) group in benzamide to a methylene (CH2) group in benzylamine.

### Step 3: Analyze the Reagents
1. **Br2 in KOH**: This is known as the Hofmann bromamide reaction, which converts amides to amines but also reduces the carbon count. This would yield aniline instead of benzylamine, so it is not suitable.

2. **LiAlH4 (Lithium Aluminum Hydride)**: This is a strong reducing agent that can effectively reduce the carbonyl group in benzamide to a methylene group, yielding benzylamine.

3. **Concentrated HNO3**: This is an oxidizing agent and would not facilitate a reduction reaction. Thus, it is not suitable.

4. **Aqueous KOH**: This is a hydrolyzing agent and does not perform reduction. Therefore, it is not suitable.

### Step 4: Conclusion
The most suitable reagent for converting benzamide to benzylamine is **LiAlH4**.

### Final Answer
**LiAlH4** is the correct reagent for the conversion of benzamide to benzylamine.

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