Question

State the conditions required for the reactions to take place: Catalytic hydrogenation of ethyne.

Answer 1

Conditions required for Catalytic hydrogenation of ethyne.

• Acetylene ($C_2{H}_2$) is the first member of the alkyne series. $IUPAC$ name of Acetylene is Ethyne ($C_2{H}_2$).
• Alkynes are hydrocarbons with Carbon-Carbon triple bond ($C\equiv C$).
• They have the root word with suffix ‘-yne’. It comes with the general formula $C_n{H}_{2n-2}$.
• At $300°C$, when Hydrogen ($H_2$) is added in the presence of Nickel ($Ni$) as a catalyst, Ethene is formed.

$\underset{\mathrm{Ethyne}}{\mathrm{CH}\equiv \mathrm{CH}}\left(g\right)+\underset{\mathrm{Hydrogen}}{{\mathrm{H}}_2\left(\mathrm{g}\right)}\stackrel{\mathrm{Ni},∆}{\to }\underset{\mathrm{Ethene}}{{\mathrm{CH}}_2={\mathrm{CH}}_2\left(\mathrm{g}\right)}$