Constitutional (structural) isomers
|
|
|---|---|
| the molecular formula of | the molecular formula of |
| propan-1-ol: C3H8O | propan-2-ol: C3H8O |
these two may be called positional isomers but
methyl ethyl ether, also with the molecular formula of C3H8O could not.
It is a constitutional or structural isomer of both of the propanols.
