What happens when ethyl alcohol is treated with diazomethane in the presence of `HBF_(4)` ?

Explanation

To solve the question of what happens when ethyl alcohol is treated with diazomethane in the presence of HBF4, we can follow these steps:

### Step 1: Identify the Reactants
- The reactants in this reaction are ethyl alcohol (CH3CH2OH) and diazomethane (CH2N2).

### Step 2: Understand the Role of HBF4
- HBF4 (tetrafluoroboric acid) acts as a catalyst in this reaction. It helps facilitate the reaction between ethyl alcohol and diazomethane.

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