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Question
What is the correct IUPAC name of the compound?
CH2=CHCH2C CH?
Options:
A .  1,4-Pentenyne
B .  Pent-1-en-4-yne
C .  Pent-1-yn-4-ene
D .  1, 4-Pentynene
Answer: Option B
:
B
While naming, the double bond gets a lower number than the triple bond.
C1H2=C2HC3H2C4C5H
Wort root = pent
Pent-1-en-4-yne
Not 4-Penten-1-yne
Because, if there is a choice in numbering, the double bond is always given preferenceover the triplebond.

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