Which of the following amines from `N-` nitroso derivative when treated with `NaNO_(2)` and `HCI`?

Options

A. `CH_(3)NH_(2)`
B.
C.
D.

Answer

To determine which amine forms an N-nitroso derivative when treated with sodium nitrite (NaNO2) and hydrochloric acid (HCl), we need to analyze the behavior of different types of amines under these conditions.

### Step-by-Step Solution:

1. **Understand the Reaction Conditions**:
- Sodium nitrite (NaNO2) and hydrochloric acid (HCl) generate nitrous acid (HONO) in situ. This is the key reagent that will react with the amines.

2. **Identify the Types of Amines**:
- Amines can be classified as primary, secondary, or tertiary:
- **Primary amines**: Have the structure R-NH2.
- **Secondary amines**: Have the structure R1R2NH (where R1 and R2 are alkyl or aryl groups).
- **Tertiary amines**: Have the structure R1R2R3N (where R1, R2, and R3 are alkyl or aryl groups).

3. **Determine the Reactivity with Nitrous Acid**:
- **Primary amines** react with nitrous acid to form N-nitroso derivatives.
- **Secondary amines** also react with nitrous acid to form N-nitroso derivatives.
- **Tertiary amines** do not form N-nitroso derivatives because they do not have a hydrogen atom attached to the nitrogen that can be replaced.

4. **Analyze the Given Options**:
- If the options include:
1. Primary amine (e.g., R-NH2)
2. Tertiary amine (e.g., R1R2R3N)
3. Secondary amine (e.g., R1R2NH)
4. Another primary amine (e.g., aniline, C6H5NH2)
- The secondary amine is the one that will react to form the N-nitroso derivative.

5. **Conclusion**:
- The amine that will form an N-nitroso derivative when treated with NaNO2 and HCl is the **secondary amine**.

### Final Answer:
The third option (the secondary amine) forms the N-nitroso derivative when treated with NaNO2 and HCl.