Question

11. Write down the synthetic scheme for the formation of 4-methylphenol from toluene.

12. What is “Fremy's salt”? Write the molecular formula of Fremy's salt. Write the structure of the product obtained from phenol under the treatment of Fremy's salt in water.

13. Write and explain the synthetic schemes for the preparation of 1-Methyl-cis-1,2 cyclohexanediol and 1- Methyl-trans-1,2 cyclohexanediol from 1-Methylcyclohexene.

Answer 1

11.

At high temperature sulphonation reaction favored para substitution product.

12.

Fremy's salt is potassium nitrosodisulphonate.

Formula is K(SO₃)₂NO.

13.

Mechanisms are given below.