Which will not go for diazotisation

Options

A. `C_(6)H_(5)NH_(2)`
B. `C_(6)H_(5)CH_(2)NH_(2)`
C.
D.

Explanation

To determine which compound will not undergo diazotization, we need to understand the conditions required for a compound to participate in this reaction. Diazotization typically occurs with primary aromatic amines, where the amino group (-NH2) is directly attached to an aromatic ring.

### Step-by-Step Solution:

1. **Identify the Compounds**: The question presents several compounds, including aniline and others with different substituents. We need to analyze each compound to see if they contain a primary aromatic amine.

2. **Understanding Diazotization**: Diazotization is a reaction where a primary aromatic amine reacts with nitrous acid (HNO2) to form a diazonium salt. For this reaction to occur, the amino group (-NH2) must be directly attached to the aromatic ring.

3. **Analyzing Aniline**: Aniline (C6H5NH2) has the amino group directly attached to the benzene ring. Therefore, it can undergo diazotization.

4. **Analyzing Other Compounds**:
- If a compound has an amino group that is not directly attached to the benzene ring (for example, if it is part of a side chain or attached to a non-aromatic system), it will not undergo diazotization.
- For example, compounds like -NH2 attached to a carbon chain (not directly to benzene) will not be able to undergo this reaction.

5. **Conclusion**: After analyzing the compounds, the one that does not have the -NH2 group directly attached to the benzene ring will be the one that does not undergo diazotization.

### Final Answer:
The compound that will not undergo diazotization is the one where the -NH2 group is not directly attached to the benzene nucleus.

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