In electrophilic halogenation the addition of elemental bromine or chlorine to alkenes yields vicinal dibromo- and dichloroalkanes (1,2-dihalides or ethylene dihalides), respectively.
Na haloxenación electrofílica a adición de bromo ou cloro elementais a alquenos rende dibromo- e dicloroalquenos (1,2-dihaluros ou etileno dihaluros) veciñais, respectivamente.