Question

Considering the reaction of Benzene with CO and HCl in the presence of anhydrous AlCl₃/CuCl (Gattermann-Koch reaction), identify product X : 

• A. A
• B. B
• C. C
• D. D

Hint:

Think of Gattermann-Koch as a variation of Friedel-Crafts acylation using a "formyl" group.

Answer 1

The Correct Option is C

The question involves the Gattermann-Koch reaction, which is an important method for formylation of benzene derivatives. Let's analyze the reaction and identify the product.

Gattermann-Koch Reaction Explanation: 

• The Gattermann-Koch reaction involves the formylation of aromatic compounds using carbon monoxide (CO) and hydrogen chloride (HCl) in the presence of catalysts such as anhydrous aluminum chloride (AlCl₃) and copper(I) chloride (CuCl).
• In this reaction, benzene reacts with CO and HCl to form benzaldehyde.

Given the reaction involves benzene, CO, and HCl with anhydrous AlCl₃/CuCl, the product of the reaction is benzaldehyde.

Identifying the Correct Option:

1. A. This structure does not correspond to benzaldehyde.
2. B. This structure does not correspond to benzaldehyde.
3. C. This option shows benzaldehyde, which is the correct product of the Gattermann-Koch reaction.
4. D. This structure does not correspond to benzaldehyde.

Therefore, the correct answer is Option C.