Reactions of anodic and chemical aromatic substitution

Among anodic (electro-oxidative) aromatic substitution reactions there is a specific group of reactions involving direct nucleophilic replacement of hydrogen atom at the aromatic ring, or S-N(H)(An) reactions. These reactions occurring via an intermediate sigma(+) complex represent a versatile type (the hydrogen atom that is easily removed as a proton) of S-N(H) reactions, on the one hand, and are somewhat similar to aromatic electrophilic substitutions, on the other hand.