Nucleophilic Aromatic Substitution Definition:

A substitution reaction in which an aromatic ring is attacked by a nucleophile, which replaces a leaving group.

Nucleophilic Aromatic Substitution Explained:

SNAr mechanism and involves a resonance-stabilized anionic intermediate called the Meisenheimer complex. or the SNAr mechanism to be operant, the aromatic ring in the substrate must bear, on ortho and/or para positions with respect to the leaving group, one or more ligands that withdraw electrons by resonance.