Question

Chlorobenzene reacts with Mg in dry ether to give a compound (\( A \)) which further reacts with ethanol to yield:

• A. \( \text{Phenol} \)
• B. \( \text{Benzene} \)
• C. \( \text{Ethylbenzene} \)
• D. \( \text{Phenyl ether} \)

Hint:

Hydrocarbons is released when Grignard reagents react with alcohols. Always identify the functional groups involved in the reaction to predict the outcome.

Answer 1

The Correct Option is B

The reaction proceeds in two steps: 1. Chlorobenzene (\( \text{C}_6\text{H}_5\text{Cl} \)) undergoes a reaction with magnesium in dry ether to form phenyl magnesium chloride (\( \text{C}_6\text{H}_5\text{MgCl} \)), which is a Grignard reagent: \[ \text{C}_6\text{H}_5\text{Cl} + \text{Mg} \xrightarrow{\text{dry ether}} \text{C}_6\text{H}_5\text{MgCl}. \] 2. Phenyl magnesium chloride then reacts with ethanol (\( \text{C}_2\text{H}_5\text{OH} \)) to produce benzene (\( \text{C}_6\text{H}_6 \)) and magnesium ethoxide (\( \text{C}_2\text{H}_5\text{OMgCl} \)): \[ \text{C}_6\text{H}_5\text{MgCl} + \text{C}_2\text{H}_5\text{OH} \to \text{C}_6\text{H}_6 + \text{C}_2\text{H}_5\text{OMgCl}. \] Final Answer: \[ \boxed{\text{Benzene}} \]