Complexes of tri-(2-pyridyl)amine. Part II. Some complexes with metal halides. The ligand field strength of terdentate tri-(2-pyridyl)amine

Abstract

The structure of some new complexes of tri-(2-pyridyl)amine with the chlorides and bromides of manganese(II), cobalt(II), nickel(II), copper(II), zinc(II), palladium(III), rhodium(III), and iridium(II) are discussed. Terdentate tri-(2-pyridyl)amine is recognised as a strong-field ligand (Δ= 12,820 cm.^–1 with respect to Ni^II) thus indicating that strong conjugation between the aromatic centres in polypyridyl ligands is not a prerequisite for high ligand field strength.