Which of the following will not react with sodiumnitrite and HCl?

Options

A.
B.
C.
D.

Answer

To determine which of the given compounds will not react with sodium nitrite (NaNO2) and hydrochloric acid (HCl), we need to understand the conditions under which amines react with these reagents.

### Step-by-Step Solution:

1. **Understanding the Reaction**: Sodium nitrite and hydrochloric acid are used for diazotization, a reaction that typically involves primary amines. The reaction generates a nitrous acid (HNO2) which can convert primary amines into diazonium salts.

2. **Identifying Amines**: The question provides several options that are derivatives of amines. We need to classify these amines based on their structure:
- **Primary amines**: Have one NH2 group and can react with NaNO2 and HCl.
- **Secondary amines**: Have two alkyl or aryl groups attached to the nitrogen and can also react, but less readily than primary amines.
- **Tertiary amines**: Have three alkyl or aryl groups attached to the nitrogen and do not have an NH bond, hence cannot participate in the diazotization reaction.

3. **Analyzing Each Option**:
- **Option 1**: Primary amine - can react.
- **Option 2**: Aromatic amine - can react through C-nitroso reaction.
- **Option 3**: Secondary amine - can react, although less efficiently.
- **Option 4**: Tertiary amine - cannot react because it lacks an NH bond.

4. **Conclusion**: Since tertiary amines do not have an NH bond, they cannot undergo diazotization with sodium nitrite and HCl. Therefore, the correct answer is **Option 4**.

### Final Answer:
**Option 4** will not react with sodium nitrite and HCl.

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