Question

Sandmeyer reaction is better than Gattermann reaction because:

• A. Sandmeyer reaction uses salt of copper while Gattermann reaction uses copper powder
• B. Only one salt is produced in Sandmeyer reaction while Gattermann rection produces two salts
• C. Sandmeyer reaction gives better yield than Gattermann reaction
• D. All of the above

Answer 1

The correct option is C Sandmeyer reaction gives better yield than Gattermann reaction

Sandmeyer reaction is a type of substitution reaction that is widely used in the production of aryl halides from aryl diazonium salts. Copper salts like chloride, bromide or iodide ions are used as catalysts in this reaction. Notably, Sandmeyer reaction can be used to perform unique transformations on benzene. The transformations include hydroxylation, trifluoromethylation, cyanation, and halogenation.

Gattermann reaction is used for obtaining chlorobenzene or bromobenzene from benzenediazonium chloride by treating it with Cu/HCl or Cu/HBr respectively.

Sandmeyer reaction is preferred over Gatterman due to better yield in case of Sandmeyer reaction.
So, (c) is correct.