Question

Give the $IUPAC$ name of acetylene.

Answer 1

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 ($C-C$) triple bond. They have the root word with suffix ‘-yne’. It comes with the general formula $C_n{H}_{2n-2}$.

$\underset{\underset{\mathrm{Acetylene}}{\mathrm{Structural}\mathrm{formula}\mathrm{of}}}{\mathrm{HC}\equiv \mathrm{CH}}$

Determination of Root Word

Select the continuous chain with the maximum number of Carbon ($C$) atoms.

Here, the chain is having $2$ Carbon ($C$) atoms along with Hydrogen atoms ($H$). So, the root word will be “Eth”

Determination of suffix

The suffix will be “yne”.

So, Ethyne is the $IUPAC$ designation for Acetylene ($C_2{H}_2$).