Benzoyl chloride is prepared from benzoic acid by
Cl2, h
SO2Cl2
SOCl2
Cl2 , H2O
As we learnt ,
Reaction of carboxylic acid with PCl5, PCl3 and SOCl2 -
⇒ Hydroxyl group of carboxylic acid is replaced by chlorine atom.
⇒ Reaction with Thionyl chloride gives a pure product as the other two products are gaseous and escape the mixture easily.
⇒ C - OH bond cleavage.
- wherein