Question

What is the major product formed when diazonium salt undergoes Gatterman reaction?

• A. Haloarene
• B. Aryl amine
• C. Phenol
• D. Diphenyl ether

Answer 1

The Correct Option is A

In the Gatterman reaction, a diazonium salt is reacted in the presence of copper powder and a halogen acid, such as hydrochloric acid (HCl) or hydrobromic acid (HBr). The reaction can be summarized by the following steps:

1. Formation of Diazonium Salt: An aryl amine is converted into a diazonium salt via reaction with nitrous acid at low temperatures.
2. Substitution Reaction: In the presence of copper powder and a halogen acid, the diazonium group (N₂⁺) is replaced by a halogen atom (such as Cl or Br).
3. Formation of Haloarene: The major product formed is an aryl halide, commonly termed as haloarene.

Therefore, the major product of the Gatterman reaction when a diazonium salt undergoes is Haloarene.

Answer 2

The Gatterman reaction is a formylation reaction in which a diazonium salt reacts with carbon monoxide (CO) and hydrogen chloride (HCl) in the presence of a Lewis acid (usually AlCl₃). This reaction results in the formation of an aryl aldehyde. However, when a halide is used instead of the formylating agent, the reaction can produce a haloarene.

For the given options:

• Haloarene: A diazonium salt reacts with a halogen (like Cl, Br, or I) to form a haloarene (a compound where a halogen is attached to an aromatic ring).
• Aryl amine: The product of a diazonium reaction would typically not give an aryl amine, as it is formed from a primary amine before it is diazotized.
• Phenol: Phenol would be formed in a reduction reaction (like the Sandmeyer reaction) but not as a major product in the Gatterman reaction.
• Diphenyl ether: This is not a major product of the Gatterman reaction.

Thus, the major product formed when diazonium salt undergoes the Gatterman reaction is haloarene.