Question

Which one of the following reactions will not result in the formation of a carbon-carbon bond?

• A. Reimer-Tiemann reaction
• B. Friedel Craft's acylation
• C. Wurtz reaction
• D. Cannizzaro reaction

Hint:

The Cannizzaro reaction involves the disproportionation of aldehydes and does not result in the formation of a carbon-carbon bond.

Answer 1

The Correct Option is D

Step 1: The Reimer-Tiemann reaction involves the formylation of an aromatic compound, which results in the formation of a carbon-carbon bond between the aromatic ring and the formyl group (\( {C-H} \) bond). Therefore, a C-C bond is formed.
Step 2: Friedel Craft's acylation is a reaction where an acyl group (\( {RCO} \)) is attached to an aromatic ring, leading to the formation of a new C-C bond.
Step 3: The Wurtz reaction involves the coupling of two alkyl halides in the presence of sodium metal, forming a new C-C bond between the two alkyl groups.
Step 4: In the Cannizzaro reaction, there is no formation of a new C-C bond. Instead, the reaction involves the disproportionation of non-enolizable aldehydes, leading to the formation of an alcohol and a carboxylate anion without the formation of a new C-C bond.
Step 5: Therefore, the correct answer is the Cannizzaro reaction, as it does not form a new C-C bond.