Question

The correct IUPAC name of 2-ethyl-3-pentyne is ______.

Options

• 3-methyl hexyne-4

• 4-ethyl pentyne-2

• 4-methyl hex-2-yne

• None of these

Answer 1

The correct IUPAC name of 2-ethyl-3-pentyne is 4-methyl hex-2-yne.

Explanation:

\[\begin{array}{cc}
\ce{H3C - \overset{4}{C}H - \overset{3}{C} ≡ \overset{2}{C} - \overset{1}{C}H3}\\
|\phantom{...........}\\\
\ce{\underset{4-methyl hex-2-yne}{\underset{5}{C}H2 - \underset{6}{C}H3}}\phantom{.}
\end{array}\]