Amine produced by the Hoffmann degradation of benzamide is

Options

A. Secondary amine
B. Aliphatic amine
C. Tertiary amine
D. Aromatic amine

Answer

To determine the amine produced by the Hofmann degradation of benzamide, we can follow these steps:

### Step 1: Identify Benzamide Structure
Benzamide is an aromatic amide with the structure:
\[ \text{C}_6\text{H}_5\text{C(O)NH}_2 \]
This consists of a benzene ring (C6H5) attached to a carbonyl group (C=O) and an amine group (NH2).

### Step 2: Understand Hofmann Degradation
The Hofmann degradation reaction involves the conversion of an amide to a primary amine. In this case, the benzamide will be transformed into an amine through the Hofmann degradation process.

### Step 3: Perform the Reaction
When benzamide undergoes Hofmann degradation, it loses the carbonyl group and forms an amine. The reaction can be summarized as:
\[ \text{C}_6\text{H}_5\text{C(O)NH}_2 \rightarrow \text{C}_6\text{H}_5\text{NH}_2 + \text{by-products} \]
The product formed is aniline (C6H5NH2).

### Step 4: Classify the Amine
Aniline is classified as an aromatic amine because it contains a benzene ring directly attached to the amine group (NH2).

### Conclusion
Thus, the amine produced by the Hofmann degradation of benzamide is an aromatic amine.

### Final Answer
The correct answer is: **Aromatic amine.**

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