# Isobutene IUPAC naming [closed]

What is the correct name of an isomer of isobutene $\ce{C4H8}$: 1,1-dimethylethene or 2-methylprop-1-ene? I have done an exam recently and I'm just curious about what what would be correct.

## closed as off-topic by Mithoron, Todd Minehardt, Jon Custer, bon, ronNov 23 '17 at 15:26

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