Chemical Properties of Alkanes:: Alkanes being saturated compounds mostly show substitution reactions. Their oxidation is very difficult thus even strong oxidizing agents like KMnO4, K2Cr2O7 etc cannot oxidize them. Halogenation: Halogens replace hydrogen from alkanes and it is called halogenation of alkanes. The order of reactivity of halogens with alkanes is F2>Cl2>Br2>I2 Fluorine shows aChemical Properties of Alkanes | Halogenation and Oxidation in alkanes