During the Rosenmund reduction of acyl chlorides to aldehydes using , what is the critical function of Barium Sulfate () and trace amounts of quinoline?

Question

During the Rosenmund reduction of acyl chlorides to aldehydes using $H_2/Pd$, what is the critical function of Barium Sulfate ($BaSO_4$) and trace amounts of quinoline?

Prashant Kotian · Accepted Answer

Correct answer: C. The highly active untreated Pd catalyst would vigorously reduce the acyl chloride all the way past the aldehyde stage to a primary alcohol. acts as a poison to safely halt reduction at the aldehyde.

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