Phenol, `C_(6)H_(5)OH` is allowed to react with diazomethane, `CH_(2)N_(2)`. The product formed is:

Options

A. `C_(6)H_(5)OCH_(3)`
B.
C.
D. `C_(6)H_(5)CH_(2)OH`

Explanation

To determine the product formed when phenol reacts with diazomethane, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactants**:
- The reactants are phenol (C₆H₅OH) and diazomethane (CH₂N₂).

2. **Understand the Mechanism**:
- Diazomethane (CH₂N₂) has a reactive methylene group (CH₂) that can be involved in nucleophilic substitution reactions. The nitrogen atoms in diazomethane are part of a diazo group, which can leave as nitrogen gas (N₂).

3. **Nucleophilic Attack**:
- The oxygen atom in phenol has a lone pair of electrons and is negatively charged due to its electronegativity. This allows it to act as a nucleophile.
- The hydrogen atom of the hydroxyl group (–OH) in phenol is slightly positive due to the electronegativity of oxygen.

4. **Formation of an Intermediate**:
- The nucleophilic oxygen from phenol attacks the electrophilic carbon in the diazomethane (CH₂), resulting in the formation of a new bond.
- This leads to the formation of an intermediate where the hydrogen from the hydroxyl group is transferred to the nitrogen of diazomethane.

5. **Elimination of Nitrogen Gas**:
- The bond between the carbon and one of the nitrogen atoms in diazomethane breaks, leading to the release of nitrogen gas (N₂).
- The oxygen from phenol now forms a bond with the methyl group (CH₃) from diazomethane.

6. **Final Product**:
- The final product of this reaction is methyl phenyl ether, which is represented as C₆H₅OCH₃.

### Conclusion:
The product formed when phenol reacts with diazomethane is methyl phenyl ether (C₆H₅OCH₃).