Question

What will be the IUPAC name of
CH=CH-O-CH3
​

Answer 1

The Common or Trivial name of this Compound is CROTONALDEHYDE.

The IUPAC name of this Compound is

BUT-2-ENE-1-AL.

Even if you don't mention the number-1, nothing wrong in it, because the Aldehydic group is the only functional group and it has to be given the priority with number-1- carbon atom. So it's IUPAC name may be mentioned as But-2-enal

Answer 2

Answer:

methoxy ethene I think this might help u very much