Question:
Chlorobenzene reacts with Mg in dry ether to give a compound A, which further reacts with ethanol to give B. Identify B.
Chlorobenzene reacts with Mg in dry ether to give a compound A, which further reacts with ethanol to give B. Identify B.
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Grignard reagents are destroyed by compounds having an acidic hydrogen, such as alcohols.
Updated On: Nov 12, 2026
- Phenol
- Benzene
- Ethyl benzene
- Phenyl ether
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The Correct Option is B
Solution and Explanation
Step 1: Step 1: Form A
Chlorobenzene reacts with Mg in dry ether to give the Grignard reagent phenylmagnesium chloride, \(\text{C}_6\text{H}_5\text{MgCl}\).
Step 2: Step 2: Reaction with ethanol
A Grignard reagent behaves as a strong base. It takes the acidic proton from the O-H group of ethanol.
Step 3: Product
The phenyl group picks up the proton and becomes benzene. \(\text{C}_6\text{H}_5\text{MgCl} + \text{C}_2\text{H}_5\text{OH} \rightarrow \text{C}_6\text{H}_6 + \text{Mg(OC}_2\text{H}_5)\text{Cl}\).
Final Answer:
B is benzene. \[ \boxed{\text{(B) }\text{Benzene}} \]
Chlorobenzene reacts with Mg in dry ether to give the Grignard reagent phenylmagnesium chloride, \(\text{C}_6\text{H}_5\text{MgCl}\).
Step 2: Step 2: Reaction with ethanol
A Grignard reagent behaves as a strong base. It takes the acidic proton from the O-H group of ethanol.
Step 3: Product
The phenyl group picks up the proton and becomes benzene. \(\text{C}_6\text{H}_5\text{MgCl} + \text{C}_2\text{H}_5\text{OH} \rightarrow \text{C}_6\text{H}_6 + \text{Mg(OC}_2\text{H}_5)\text{Cl}\).
Final Answer:
B is benzene. \[ \boxed{\text{(B) }\text{Benzene}} \]
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