SEARCH Articles Figures Tables Aromaticity electrophilic aromatic substitution Aromatics electrophilic substitution Electrophile Electrophilic aromatic substitution Substitution electrophilic aromatic Substitution electrophilic aromatic substitutions Sulfur electrophiles Sulfur electrophilic Sulfur substituted Sulfur substitution Sulfur trioxide Sulfur trioxide electrophilic substitution