Which is formed when benzylamine react with nitrous acid ?

Options

A. `C_(6)H_(5)OH`
B. `C_(6)H_(5)ON a`
C. `C_(6)H_(5)N_(2)^(+)OH^(-)`
D. `C_(6)H_(5)CH_(2)OH`

Answer

To determine what is formed when benzylamine reacts with nitrous acid, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactants**:
- Benzylamine (C6H5CH2NH2) is the amine that will react with nitrous acid (HNO2).

2. **Write the Structure of Benzylamine**:
- Benzylamine consists of a benzene ring (C6H5) attached to a CH2 group, which is further connected to an amino group (NH2).

3. **Reaction with Nitrous Acid**:
- When benzylamine reacts with nitrous acid, the nitrous acid can be represented as HNO2, which can be broken down into OH and N≡O (nitrous oxide).

4. **Formation of an Intermediate**:
- The amino group (NH2) of benzylamine reacts with nitrous acid, leading to the formation of a diazonium salt (C6H5CH2N2^+).
- The reaction produces nitrogen gas (N2) and water (H2O) as by-products.

5. **Tautomerization**:
- The diazonium salt can undergo tautomerization, where the nitrogen atom can rearrange to form a stable structure.

6. **Formation of Benzyl Alcohol**:
- The final product of the reaction is benzyl alcohol (C6H5CH2OH). This occurs after the loss of nitrogen gas and the subsequent attack of water on the carbocation formed during the reaction.

7. **Conclusion**:
- Therefore, when benzylamine reacts with nitrous acid, the final product formed is benzyl alcohol (C6H5CH2OH).

### Final Answer:
The product formed when benzylamine reacts with nitrous acid is **benzyl alcohol (C6H5CH2OH)**.