CH3-CH2-CH3 + 2Cl2 => CH3-CH2-CHCl2 + 2HCl
................................................. 1,1-dicloro.....
CH3-CH2-CH3 + 2Cl2 => CH3-CHCl-CH2Cl + 2HCl
................................................ 1,2-diclor....
CH3-CH2-CH3 + 2Cl2 => CH3-CCl2-CH3 + 2HCl
................................................. 2,2-dicloro.....
CH3-CH2-CH3 + 2Cl2 => ClCH3-CH2-CH2Cl + 2HCl
................................................. 1,3-diclor
=> 4 produsi izomeri de pozitie
