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Problem 4 - Olympiad
The IUPAC name for CH₂=C(CH₃)–CH₂–C≡CH is
A. 1-Methylbuta-1,3-diene
B. 3-Methylpent-4-yn-2-ene
C. 2-Methylpent-3-en-5-yne
D. 2-Methylpenta-1,3-dien-5-yne
Check Answer
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Correct: C
Numbering from the correct end gives the lowest locant. The triple bond takes precedence over the double bond, making the correct name 2-methylpent-3-en-5-yne.