Hi friends, I have this as an Alkene, and is the correct name Ethyl Propene?

Also, when do you use numbers? Like, is this one just Ethyl Propene, or should it be 1 Ethyl Propene? When do you use numbers? THANK YOU

1 Answer
Apr 1, 2018

This is really the only structure that could satisfy what you're proposing to name this molecule,

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And still, it would be called, 2-methylbutene.

If you're referring to this compound,

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The correct name would be, pent-2-ene.

Numbers in nomenclature are locants of specific features of the molecule.