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

The Rosenmund reduction selectively converts acyl chlorides into aldehydes. This reaction employs palladium on barium sulfate (Pd-BaSO$_4$) as a catalyst, which is partially poisoned to inhibit the over-reduction of the aldehyde to an alcohol. This controlled catalysis ensures the selective production of aldehydes from acyl chlorides when reacted with hydrogen gas. Consequently, Pd-BaSO$_4$ serves as a catalyst for the selective reduction of acyl chlorides to aldehydes.