The IUPAC name of is:

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Question

The IUPAC name of $CH_3-CH=CH-C \equiv CH$ is:

Prashant Kotian · Accepted Answer

Correct answer: B. The lowest locant set rule for multiple bonds takes absolute priority over double-bond preference. Numbering right-to-left gives locants (1, 3). Left-to-right gives (2, 4). The set (1, 3) wins. Therefore, the triple bond is at C1. The name is Pent-3-en-1-yne.

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