Write chemical reaction to affect the following transformations :
3-Nitrobromobenzene to 3-nitrobenzoic acid.

Explanation

To convert 3-nitrobromobenzene to 3-nitrobenzoic acid, we can follow these steps:

### Step 1: Formation of Grignard Reagent
First, we need to convert 3-nitrobromobenzene into a Grignard reagent. This is done by treating it with magnesium in dry ether.

**Chemical Reaction:**
\[ \text{3-Nitrobromobenzene} + \text{Mg} \xrightarrow{\text{dry ether}} \text{3-Nitrobromobenzene-MgBr} \]

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