Question

The $IUPAC$ name of the compound having the formula $CH\equiv C-CH=C{H}_2$ is:

• A. $1-$butyn$-3-$ene
• B. but$-1-$no$-3-$ene
• C. $3-$buten$-1-$yne
• D. $1-$buten$-3-$yne

Answer 1

The correct option is D $1-$buten$-3-$yne

Priority is given to double bond as compared to a triple bond. According to this, naming should be done from the right-hand side. Double bond at the C-1 position and triple bond at C-3.
IUPAC name is 1-buten-3-yne