Question

How benzene can be prepared from Grignard reagent??!!!!​

Answer 1

Answer:

The general formula of Great reagent is R-Mg-X or Ar-Mg-X

R- alkyl group

X -halogens

Ar - aryl group

So, for the preparation of benzene Ar-Mg-X is used .

ie, benzene chloride is treated with sodium in presence of dry ether to give grignard reagent (benzene magnesium chloride) which on hydrolysis gives benzene and an additional product.

C6H5Cl +Na (dry ether) — C6H5-Mg-Cl(H2O)—C6H5-H + Mg(OH)

C6H5-H means C6H6 which is the benzene we needed.

Halogens other than Cl can also be used and alkyl / aryl group is changed in accordance with the product required.