What is the correct nomenclature of the following compound?

2-chloropent-4-yne

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4-chloropent-2-yne

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1-chloropent-4-yne

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4-chloropent-1-yne

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Solution

The correct option is D 4-chloropent-1-yne
The given compound contains Alkyne(suffix : yne) and a halogen, alkyne is given priority over Cl according to IUPAC so the Cl is made as prefix and counting starts from the carbon from where alkyne gets less numbering.

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Total number of steroisomers possible for 4-chloropent-2-ene is

C H_{3} - C H_{2} - C \equiv C H

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