Question

Write the equation for the conversion of ethyne to benzene

Answer 1

Ethyne $\left({\mathrm{C}}_2{\mathrm{H}}_2\right)$ is unsaturated hydrocarbon. It contains triple bond between Carbon-Carbon atoms. So, it is highly reactive in nature.

Reaction:

When ethyne gas is passed through the red-hot iron tube, it leads to the formation of cyclic aromatic compound. When acetylene is heated in red-hot iron tube at 873 K, benzene is obtained.

$$\begin{gathered} 3\mathrm{H}-\mathrm{C}\equiv \mathrm{C}-\mathrm{H}\stackrel{\mathrm{Hot}\mathrm{Fe}\mathrm{Tube}}{\to }{\mathrm{C}}_6{\mathrm{H}}_6 \\ \mathrm{ethyne}\mathrm{benzene} \end{gathered}$$