Question:
Identify the reagent used for Rosenmund reduction.
Identify the reagent used for Rosenmund reduction.
Show Hint
$R-COCl \xrightarrow{H_2/Pd-BaSO_4} R-CHO$.
Updated On: Apr 30, 2026
- $H_2/Ni$
- $H_2/Pd, BaSO_4$
- $Na - Hg/H_2O$
- $SnCl_2 - H_2O$
Show Solution
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The Correct Option is B
Solution and Explanation
Step 1: Concept
Rosenmund reduction is used to reduce an acyl chloride to an aldehyde.
Step 2: Analysis
The reaction uses hydrogen gas in the presence of palladium on a barium sulfate support. $BaSO_4$ acts as a catalyst poison to prevent further reduction of the aldehyde to an alcohol.
Step 3: Conclusion
The reagent is $H_2/Pd, BaSO_4$.
Final Answer: (B)
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