Question #eb1e2

1 Answer
Aug 22, 2015

The common name is vinylcyclohexane.


I believe the structure you are thinking of is this:

The base name is cyclohexane, because the ring has more carbon atoms than the side chain.

The IUPAC name for the #"-CH=CH"_2# group is "ethenyl", so the IUPAC name of the compound is ethenylcyclohexane.

But practically nobody calls it by that name.

Instead, they use the "common name" for the #"–CH=CH"_2# group — vinyl.

The common name is therefore vinylcyclohexane.