Question

What is the product formed when benzene reacts with CO and HCl in presence of anhydrous AlCl\(_3\)? 
 

• A.

  

• B.

  

• C.

  

• D.

  

Hint:

Friedel-Crafts acylation reactions are important in organic chemistry, where an acyl group is added to an aromatic ring using a Lewis acid like AlCl\(_3\).

Answer 1

The Correct Option is A

The reaction between benzene, CO, and HCl in the presence of anhydrous AlCl\(_3\) leads to the formation of benzaldehyde through a process called the Friedel-Crafts acylation. This reaction is catalyzed by AlCl\(_3\) and the resulting product is the addition of an aldehyde group (-CHO) to the benzene ring. The reaction is as follows: \[ \text{C}_6\text{H}_6 + \text{CO} + \text{HCl} \xrightarrow{\text{AlCl}_3} \text{C}_6\text{H}_5\text{CHO} \] Thus, the correct answer is Option (A).