ORGANIC CHEMISTRY Chapter 8 8. 2B Modern statement of Markovnikov's rule o In the ionic addition of an unsymmetrical reagent to a double bond, the positive portion of the adding reagent attaches itself to a carbon atom of the double bond so as to yield the more stable carbocation as an intermediate H2C、 Cl CH3 C=CH I C-CH2—H2C-C-CH H2C HC Department of Chemistry, Xiamen UniversityORGANIC CHEMISTRY Department of Chemistry, Xiamen University Chapter 8 8.2B Modern Statement of Markovnikov’s Rule In the ionic addition of an unsymmetrical reagent to a double bond, the positive portion of the adding reagent attaches itself to a carbon atom of the double bond so as to yield the more stable carbocation as an intermediate. C CH2 H3C H3C I Clδ δ + C CH2 H3C H3C I Cl H3C C CH2 CH3 Cl I