Metal-Free С-Н Functionalization of Aromatic Compounds Through the Action of Nucleophilic Reagents -- Nucleophilic Substitution of Hydrogen in Arenes and Heteroarenes -- Direct Functionalization of C-H Fragments in Nitroarenes as a Synthetic Pathway to Condensed N-Heterocycles -- C-H Functionalizations of Heteroaromatic N-Oxides -- The SNH-Amination of Aromatic Compounds -- Electrochemical C-H Functionalization of Arenes and Heteroarenes.