Question

Catalyst used in Rosenmund reaction is:

• A. $Sn$
• B. $Zn/HCl$
• C. $Pd/BaS{O}_4$
• D. $Ni$

Answer 1

Answer: (C)

$Pd/BaS{O}_4$

A catalyst used in Rosenmund reaction can be prepared by reduction of $palladium\left(II\right)chloride$ solution in the presence of $BaS{O}_4$

The Palladium Catalyst used in Rosenmund’s reduction must be poisoned with $BaS{O}_4$ because the untreated catalyst $Palladium\left(Pd\right)$ is too reactive and will undergo over reduction forming other products.