is c2h4 an isomer
No. A hydrocarbon must have at least three or four carbon atoms to have isomers. A molecule must have at least three atoms capable of sustaining a double bond to have resonance.n isomer is a different configuration of a molecule.  See related links for example  The molecular formulas for each of these molecules are the same: CH3CH2CH2(OH). The onl â¦ y difference is the location of the OH (alcohol).