Comment Aminopyridines have been studied mainly because they form part of some biologically important mol- ecules (Schwalbe, Williams & Koetzle, 1987) and because of their ability to form metal complexes (Navarro-Ranninger, Martinez-Carrera & Garcia- Blanco, 1985; Ray & Hathaway, 1980). We have synthesized a series of new multidentate N-donor ligands, derived from aminopyridine, in order to study their complexation behaviour. 2-Anilinopyridines ...