Question

Pick the reaction that shows the Gattermann-Koch process:

• A. Benzene + methyl chloride → ethylbenzene (AlCl\(_3\) catalyst)
• B. Benzene + CO + HCl → benzaldehyde (AlCl\(_3\), CuCl catalysts)
• C. Benzene + bromine → bromobenzene (FeBr\(_3\) catalyst)
• D. Benzene + acetyl chloride → acetophenone (AlCl\(_3\) catalyst)

Hint:

The Gattermann-Koch process is a method for synthesizing benzaldehyde from benzene using CO and HCl in the presence of AlCl\(_3\) and CuCl catalysts.

Answer 1

The Correct Option is B

Step 1: Understanding the Gattermann-Koch process.
The Gattermann-Koch process is used for the formylation of benzene. In this process, benzene reacts with carbon monoxide (CO) and hydrochloric acid (HCl) in the presence of AlCl\(_3\) and CuCl catalysts to form benzaldehyde.
Step 2: Conclusion.
Thus, the correct reaction for the Gattermann-Koch process is: \[ \text{Benzene} + \text{CO} + \text{HCl} \rightarrow \text{Benzaldehyde} \] which corresponds to option (B).