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Nomenclature of Halogens, Ethers and Carboxylic Acids

What is the I...

Question

What is the IUPAC name of the following alkene?
$C H_{2} = C H - C H (C H_{3})_{2}$

A

Isopropyl ethylene

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B

2-methylbut-3-ene

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C

Isopentene

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D

3-Methylbut-1-ene

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Solution

The correct option is C 3-Methylbut-1-ene
$1 C H_{2} = 2 C H - C H_{3} 3 | C H - 4 C H_{3} 3 - m e t h y l b u t - 1 - e n e$

Numbering is done from the end, where the double bond is least numbered.

Hence, it is an alkene. At $3^{r d}$ carbon atom one methyl group is present and the longest chain contain 4 carbon atoms.

Hence, the name is 3-Methylbut-1-ene.

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