Reacțiile de clorurare duc la formare de izomeri
Izopentan
CH3-CHCH3-CH2-CH3
+ Cl2 = CH3-CHCH3-CH2-CH2-Cl
+ Cl2 = CH3-CHCH3-CHCl-CH3
+ Cl2 = CH3-C(Cl)(CH3)-CH2-CH3
+ Cl2 = Cl-CH2-CHCH3-CH2-CH3
Izobutan
CH3-CHCH3-CH3
+ 2 Cl2 = CH3-CHCH3-CH(Cl)2
+ 2 Cl2 = CH3-C(Cl)(CH3)-CH2-Cl
+ 2 Cl2 = Cl-CH2-CH(CH3)-CH2-Cl
Neopentan
(CH3)4C
+ 2 Cl2 = (CH3)3-C-CH(Cl)2
+ 2 Cl2 = Cl-CH2-C(CH3)2-CH2-Cl
Propan
CH3-CH2-CH3
+ 2 Cl2 = CH3-CH2-CH(Cl)2
+ 2 Cl2 = CH3-CHCl-CH2-Cl
+ 2 Cl2 = Cl-CH2-CH2-CH2-Cl
+ 2 Cl2 = CH3-C(Cl)2-CH3
