Which of the following catalyst is used in Rosenmund reaction?

Which of the following catalyst is used in Rosenmund reaction?
  1. $\mathrm{Cu}_{2} \mathrm{Cl}_{2}$
  2. $\mathrm{CS}_{2}$
  3. $\mathrm{Pd}-\mathrm{BaSO}_{4}$
  4. $\mathrm{V}_{2} \mathrm{O}_{5}$

Solution

When benzoyl chloride is hydrogenated in the presence palladium on barium sulphate $\left(\mathrm{Pd} / \mathrm{BaSO}_{4}\right)$, benzaldehyde is obtained. This reaction is called Rosenmund reduction.

Asked in: MHT CET 2020 (20 Oct Shift 2)

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