`C_(6)H_(5)CONHCH_(3)` can be converted into `C_(6)H_(5)CH_(2)NHCH_(3)` by .

Explanation

To convert \( C_6H_5CONHCH_3 \) (an amide) into \( C_6H_5CH_2NHCH_3 \) (a primary amine), we can utilize the Clemensen reduction method. This method involves the reduction of carbonyl compounds (such as aldehydes or ketones) to alkanes.

### Step-by-Step Solution:

1. **Identify the Functional Groups**:
- The starting compound \( C_6H_5CONHCH_3 \) contains a carbonyl group (C=O) as part of the amide functional group.
- The target compound \( C_6H_5CH_2NHCH_3 \) has a methylene group (–CH2–) instead of the carbonyl group.

2. **Recognize the Reaction Type**:
- The transformation involves the reduction of the carbonyl (C=O) to a methylene (–CH2–) group. This indicates a reduction reaction.

3. **Clemensen Reduction**:
- The Clemensen reduction is specifically used for reducing carbonyl groups in aldehydes and ketones to alkanes.
- In this case, the carbonyl group in the amide can be reduced to a methylene group.

4. **Reagents Required**:
- The Clemensen reduction typically requires zinc amalgam (Zn/Hg) and concentrated hydrochloric acid (HCl).

5. **Write the Reaction**:
- The reaction can be summarized as follows:
\[ C_6H_5CONHCH_3 \xrightarrow{Zn/Hg, HCl} C_6H_5CH_2NHCH_3 \]

### Final Answer:
The conversion of \( C_6H_5CONHCH_3 \) to \( C_6H_5CH_2NHCH_3 \) can be achieved by **Clemensen reduction using zinc amalgam and concentrated hydrochloric acid**.

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