Q.

What is correct IUPAC name of the following compound?

Moderate

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4-propyl-5-hepten-2-yne

4-( 1 -propenyl)-2-heptyne

4-propyl-2-hepten-5-yne

4-( 1 -propynyl)-2-heptene

answer is 3.

(Detailed Solution Below)

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Detailed Solution

Longest chain with both double and triple bond becomes the parent chain. In the given compound, all the locants, double bond and triple bond are equidistant from terminals. In such circumstance, numbering is done in alphabetical order, here lower number is being given to 'ene' locant and higher number to 'yne' locant.

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