Question

Ethyl Propene?

When do you use numbers? THANK YOU I actually sent the question without the photo last time.

Answer 1

See below

Explanation:

That's an alkene as you stated...
but I don't see an ethyl group, remember an ethyl group is a branch of the main chain of carbon

That's a propene
`C_3H_6`

You don't need a `1` to denote that the double bond is on the first carbon, because it will be on the first Carbon anyways

When naming in this case, you know that the double bond gets the priority, so when I start naming I can make sure in this case, that the double bond is always on the first Carbon. So a prop-2-ene does not exist