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Problem 2 - Entrance Test
The correct IUPAC name for CH₂=CHCHBrCH₂CH₃ is:
A. 1-Bromo-4-pentene
B. 4-Bromo-2-pentene
C. 2-Bromo-3-pentene
D. 2-Bromo-1-pentene
Check Answer
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Correct: D
Numbering the chain to give the double bond the lowest possible number (1-pentene) is prioritized. Substituent number (Br at C-4) becomes less critical than functional group position. Hence, correct name: 4-Bromo-1-pentene.