Choose the correct IUPAC name of the following compound:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → 4-Fluoro-3-methylpent-2-ene
IUPAC Name Analysis
For the compound in the final image, we follow standard IUPAC nomenclature rules:
- Identify the Parent Chain: The longest carbon chain containing the double bond has five carbons, making it a pentene.
- Numbering: Start numbering from the end closest to the double bond to give it the lowest possible locant. This places the double bond at carbon-2.
- Identify Substituents: There is a fluorine group at carbon-4 and a methyl group at carbon-3.
- Alphabetical Order: Fluoro comes before Methyl.
Correct IUPAC Name: 4-Fluoro-3-methylpent-2-ene