Question:
Rosenmund reduction is used to convert acyl chlorides into:
Rosenmund reduction is used to convert acyl chlorides into:
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Remember the specific reagent for Rosenmund: \( Pd-BaSO_4 \). It is the standard method to "stop" the reduction at the aldehyde stage.
Updated On: Apr 20, 2026
- Alcohols
- Carboxylic acids
- Aldehydes
- Ketones
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The Correct Option is C
Solution and Explanation
Step 1: Understanding the Question:
The question asks about the functional group transformation achieved using the Rosenmund reduction reaction.
Step 3: Detailed Explanation:
1. Reaction Description: Rosenmund reduction is a catalytic hydrogenation reaction where an acyl chloride (acid chloride) is selectively reduced.
2. Reagents: The catalyst used is hydrogen gas (\( H_2 \)) over palladium (\( Pd \)) supported on barium sulfate (\( BaSO_4 \)). The catalyst is often "poisoned" or partially deactivated with sulfur or quinoline to prevent over-reduction.
3. Chemical Transformation:
\[ R-COCl \xrightarrow{H_2 / Pd-BaSO_4} R-CHO + HCl \] - The acyl chloride (\( R-COCl \)) group is converted into an aldehyde (\( R-CHO \)) group.
- Without the poisoned catalyst (\( BaSO_4 \)), the aldehyde would be further reduced to a primary alcohol.
Step 4: Final Answer:
Rosenmund reduction converts acyl chlorides into aldehydes.
The question asks about the functional group transformation achieved using the Rosenmund reduction reaction.
Step 3: Detailed Explanation:
1. Reaction Description: Rosenmund reduction is a catalytic hydrogenation reaction where an acyl chloride (acid chloride) is selectively reduced.
2. Reagents: The catalyst used is hydrogen gas (\( H_2 \)) over palladium (\( Pd \)) supported on barium sulfate (\( BaSO_4 \)). The catalyst is often "poisoned" or partially deactivated with sulfur or quinoline to prevent over-reduction.
3. Chemical Transformation:
\[ R-COCl \xrightarrow{H_2 / Pd-BaSO_4} R-CHO + HCl \] - The acyl chloride (\( R-COCl \)) group is converted into an aldehyde (\( R-CHO \)) group.
- Without the poisoned catalyst (\( BaSO_4 \)), the aldehyde would be further reduced to a primary alcohol.
Step 4: Final Answer:
Rosenmund reduction converts acyl chlorides into aldehydes.
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