Question

The $IUPAC$ name of $CH_{3}-CH=CH-C \equiv CH$ is

• A. pent-$3$-en-$1$-yne
• B. pent-$3$-en-$4$-yne
• C. pent-$2$-en-$4$-yne
• D. pent-$2$-en-$3$-yne

Answer 1

Answer: (A)

pent-$3$-en-$1$-yne

Answer 2

The $IUPAC$ name of given compound is
$\underset{1}{{C}}{{H}_{3}}-\underset{pent\,-2-en-4-yne}{{\underset{2}{{C}}H=\underset{3}{{C}}H-\underset{4}{{C}}}}\,\equiv \underset{5}{{C}}-H$