Question

Which of the following types of reactions is used to prepare Alkyl benzene?

• A. Swartz reaction
• B. Sandmeyer reaction
• C. Finkelstein reaction
• D. Wurtz Fittig reaction

Hint:

Wurtz-Fittig reaction couples an aryl halide with an alkyl halide using sodium in dry ether.

Answer 1

The Correct Option is D

Step 1: Identify what is needed:
We need a C-C bond between a benzene ring and an alkyl group. Only a coupling reaction can do this.

Step 2: Check each name:
Swarts: halogen exchange giving $\text{R-F}$. Sandmeyer: $\text{ArN}_2^+ \rightarrow \text{ArX}$. Finkelstein: $\text{R-Cl} \rightarrow \text{R-I}$. Wurtz-Fittig: $\text{Ar-X} + \text{R-X} \rightarrow \text{Ar-R}$.

Step 3: Pick:
Only the Wurtz-Fittig reaction forms an alkyl benzene, option D.

Final Answer:
Only the Wurtz-Fittig reaction couples an aryl and an alkyl group. \[ \boxed{\text{(D) }\text{Wurtz Fittig reaction}} \]