Chlorination Mechanism Initiation:Splitting of the chlorine molecule Cl2+hv→2C First propagation step:Abstraction(removal)of a primary or secondary hydrogen CH3-CH2-CH3+CI→·CH2一CH2-CH3 or CH3-CH-CH3+HC primary radical secondary radical Second propagation step:Reaction with chlorine to form the alkyl chloride CH2一CH2-CH3+C2 →C1-CH2-CH2-CH3+C primary radical primary chloride (1-chloropropane) CI or CH3-CH-CH3 Cl2 → CH3-CH-CH3 Cl. secondary radical secondary chloride (2-chloropropane) 2013 Pearsen Education ine Chapter 4 Chlorination Mechanism Chapter 4 4