Which among the following is the correct IUPAC name of isoamylene?
$C H_{3} - C H_{3} | C H - C H = C H_{2}$

1-Pentene

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2-Methyl-2-butene

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3-Methylbut-1-ene

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2-Methylbut-1-ene

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Solution

The correct option is C 3-Methylbut-1-ene
Amyl means five carbon atoms and iso means $(C - C | C)$ group so isomylene.
$C H_{3} 4 - C H_{3} | C H 3 - C H 2 = C H_{2} 1$
Hence, correct IUPAC name is
3-Methylbut-1-ene

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