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Benzoyl chloride is prepared from benzoic acid by

Option: 1

Cl2, h\nu


Option: 2

SO2Cl2


Option: 3

SOCl2


Option: 4

Cl2 , H2O


Answers (1)

best_answer

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

RCOOH+PCl_{5}\rightarrow RCOCl+POCl_{3}+HCl


RCOOH+PCl_{3}\rightarrow 3ROCl+H_{3}PO_{3}


RCOOH+SOCl_{2}\rightarrow ROCl+SO_{2}+HCl

 

 

 

Posted by

Pankaj

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