Mononuclear manganese(IV) complexes: Deprotonated amide coordination via oxygen centre

Abstract

Syntheses and properties of a series of mononuclear manganese (lV) complexes with N-benzoyl-N'-salicylidenehydrazine and its substituted derivatives as ligands are reported. The dianionic planar Jigands bind the metal ion meridionally through phenolate-O, irnine-N and deprotonated amide-O atoms. EPR spectra of the complexes are characteristic of an axial MnO₄N₂ coordination sphere. Electronic spectral features and the metal centred redox potentials are significantly influenced by the electronic nature of the substituents on the ligands.