The IUPAC name of C2H4 is ethene.
According to the provided reference, ethylene (IUPAC name: ethene) is a hydrocarbon with the formula C2H4 or H2C=CH2. This means that the compound consisting of two carbon atoms and four hydrogen atoms, with a double bond between the carbon atoms, is systematically named "ethene" according to IUPAC nomenclature. The more common name, "ethylene," is also widely used.
