LIGAND REACTIVITY IN IRON(II) COMPLEXES OF 4'-(4'''-PYRIDYL)-2,2'/6',2''-TERPYRIDINE

The ligand 4'-(4'"-pyridyl)-2,2':6',2"-terpyridine (pyterpy) acts as a tridentate ligand in which the 4-pyridyl ring is not co-ordinated in the complex cation [Fe(pyterpy)2]2+; the non-co-ordinated ring reacts with electrophiles to give species in which the charge perturbations are localised to a '4,4'-bipyridyl' fragment.