Ncert Exercises & Solutions

Question 13.20:-

How would you convert the following compounds into benzene?

(i) Ethyne

(ii) Ethene

(iii) Hexane

(i) Benzene from Ethyne:

3 C H \underset{e t h y n e}{\equiv} C H \to_{873 K}^{R e d h o t F e}

(ii) Benzene from Ethene:

C H_{2} = C H_{2} \overset{B r_{2} / C C I_{4}}{\to} B r - C H_{2} - B r

↓ \overset{a l c K O H}{(∆)}

C H_{2} = C H B r

↓ \overset{N a N H_{2} / l i q N H_{3}}{196 K}

H C \equiv C H

↓ \overset{R e d h o t F e}{873 K}

(iii) Hexane to Benzene