Question
Write chemical equations for the following reactions:
  1. Propanone is treated with dilute $\ce{Ba(OH)_2}$.
  2. Acetophenone is treated with $\ce{Zn(Hg)}$/ Conc. $\text{HCl}$
  3. Benzoyl chloride is hydrogenated in presence of $\ce{Pd/ BaSO_4}$.

Answer

  1. This is a self $-$ aldol condensation reaction.
  1. The reaction of aldehydes and ketones with zinc amalgam $\ce{(Zn/ Hg)}$ in concentrated $\text{HCl},$ reduces the aldehyde or ketone to a hydrocarbon,and is called Clemmensen reduction.
  1. Benzoyl chloride is hydrogenated over catalyst $\ce{Pd-BaSO_{4}}$ to give benzaldehyde. This reaction is called Rosenmund Reaction.

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