Question:
Which of the following reactions can convert chlorobenzene into toluene?
Which of the following reactions can convert chlorobenzene into toluene?
Show Hint
Coupling an aryl halide with an alkyl halide using sodium in dry ether is the Wurtz-Fittig reaction.
Updated On: Nov 12, 2026
- Wurtz reaction
- Fittig reaction
- Wurtz-Fittig reaction
- Grignard reaction
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The Correct Option is C
Solution and Explanation
Step 1: Understanding the Concept
Toluene is benzene carrying a methyl group, so chlorobenzene must be coupled with a methyl halide with loss of the halogen.
Step 2: The reaction
Chlorobenzene and methyl chloride heated with sodium in dry ether give toluene:
\(\text{C}_{6}\text{H}_{5}\text{Cl} + \text{CH}_{3}\text{Cl} + 2\text{Na} \rightarrow \text{C}_{6}\text{H}_{5}\text{CH}_{3} + 2\text{NaCl}\)
Step 3: Compare the options
Wurtz reaction joins two alkyl halides and Fittig reaction joins two aryl halides.
The mixed coupling of an aryl halide and an alkyl halide is the Wurtz-Fittig reaction.
Final Answer:
The Wurtz-Fittig reaction converts chlorobenzene into toluene. \[ \boxed{\text{(C) }\text{Wurtz-Fittig reaction}} \]
Toluene is benzene carrying a methyl group, so chlorobenzene must be coupled with a methyl halide with loss of the halogen.
Step 2: The reaction
Chlorobenzene and methyl chloride heated with sodium in dry ether give toluene:
\(\text{C}_{6}\text{H}_{5}\text{Cl} + \text{CH}_{3}\text{Cl} + 2\text{Na} \rightarrow \text{C}_{6}\text{H}_{5}\text{CH}_{3} + 2\text{NaCl}\)
Step 3: Compare the options
Wurtz reaction joins two alkyl halides and Fittig reaction joins two aryl halides.
The mixed coupling of an aryl halide and an alkyl halide is the Wurtz-Fittig reaction.
Final Answer:
The Wurtz-Fittig reaction converts chlorobenzene into toluene. \[ \boxed{\text{(C) }\text{Wurtz-Fittig reaction}} \]
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