ORGANIC CHEMISTRY Chapter 15 g The most characteristic reactions of benzenoid arenes are the substitution reactions that occur when they react with electrophilic reagents o The electrophiles are either a positive ion(etor some other electron-deficient species with a large partial positive charge E +E-Nu— +h-nu Electrophilic aromatic substitution EAs) Department of Chemistry, Xiamen UniversityORGANIC CHEMISTRY Department of Chemistry, Xiamen University Chapter 15 The most characteristic reactions of benzenoid arenes are the substitution reactions that occur when they react with electrophilic reagents. The electrophiles are either a positive ion (E+) or some other electron-deficient species with a large partial positive charge. + E Nu E + H Nu Electrophilic aromatic substitution (EAS)