正丁烷:CH3CH2CH2CH3＋Cl2＝CH3CH2CHClCH3＋HCl
异丁烷：
CH3CH(CH3)CH3＋2Cl2＝CH3CCl(CH3)CH3{36％}＋CH3CH(CH3)CH2Cl{64％}＋2HCl