Question

Rosenmund reduction is used for the preparation of Aldehydes. The catalyst used in this reaction is:

• A. Pd-BaSO$_4$
• B. Anhydrous AlCl$_3$
• C. Iron (III) oxide
• D. HgSO$_4$

Hint:

Rosenmund reduction uses Pd-BaSO$_4$ to selectively reduce acyl chlorides to aldehydes, avoiding further reduction to alcohols.

Answer 1

The Correct Option is A

Rosenmund reduction is a selective reduction of acyl chlorides to aldehydes. The catalyst used in this reaction is palladium on barium sulfate (Pd-BaSO$_4$), which is partially poisoned to prevent the further reduction of the aldehyde to an alcohol. This allows the selective formation of aldehydes from acyl chlorides. In the presence of hydrogen gas, the acyl chloride is reduced to the corresponding aldehyde.
Pd-BaSO$_4$ is used as a catalyst for the selective reduction of acyl chlorides to aldehydes.