Give the IUPAC name of the following compound | vedclass

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(A) The given structure is a hydrocarbon chain with $5$ carbon atoms containing both a double bond and a triple bond. According to $IUPAC$ nomenclatur

Vedclass · Accepted Answer

Pent-$1$-en-$4$-yne

Vedclass · Answer

(A) The given structure is a hydrocarbon chain with $5$ carbon atoms containing both a double bond and a triple bond. According to $IUPAC$ nomenclature rules,when both double and triple bonds are present,the numbering is done such that the double bond gets the lower locant if there is a choice. Numbering from the left: the triple bond is at position $1$ and the double bond is at position $4$. Numbering from the right: the double bond is at position $1$ and the triple bond is at position $4$. Since the double bond gets priority for the lower number,we number from the right. Thus,the double bond is at position $1$ and the triple bond is at position $4$. The parent chain has $5$ carbons,so it is a pentene-yne derivative. The correct name is Pent-$1$-en-$4$-yne.

Give the $IUPAC$ name of the following compound.

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