Question

Which among the following compounds is obtained when benzene is treated with CO and HCl in presence of catalyst anhydrous AlCl₃ and Cu₂Cl₂ under high pressure?

Options

• Acetophenone

• Toluene

• Benzoic acid

• Benzaldehyde

Answer 1

Benzaldehyde

Explanation:

Gatterman - Koch formylation of arene:

When vapours of CO and HCl are passed into benzene in the presence of anhydrous AlCl₃/CuCl, benzaldehyde is obtained.