Which one is incorrect name?

Propyne

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But-2-yne

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Pent-3-yne

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But-1 -yne

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Solution

The correct option is C Pent-3-yne
The correct answer is option C, because As the structural formula of Pent-3-yne is $C H_{3} - C H_{2} - C \equiv C - C H_{3}$ , According to the IUPAC nomenclature the numbering of the carbon atom is done from that side of the carbon chain from which the triple bond is nearest as in this structure the numbering can also be done from right side. Therefore, the correct IUPAC name of the compound is $P e n t - 2 - y n e$ .

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\frac{x - 1}{1} = \frac{y - 2}{2} = \frac{z - 3}{3}

\frac{x - 1}{1} = \frac{y - 2}{2} = \frac{z - 3}{3}

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