Synthesis, spectroscopic and electrochemical studies of bis(N-aryl-3,5-di-t-butyl-salicylaldiminato)cobalt(II) complexes

The synthesis and characterization (elemental analysis i.r. u.v. magnetic measurements and cyclic voltammetry) of some new Co^II complexes with bidentate bulky salicylaldimines derived from 35-di-t-butylsalicylaldehyde and o- or p-substituted (X = Cl Me OMe Bu ^t ) aniline derivatives are reported in this paper. The presented ligands show very low complexation ability in respect of Ni^II VO^II Mn^II Zn^II and Cd^II metal ions. Electrochemical studies on the complexes though revealing a dependence of the metal centered redox potentials on electronic and steric effects of the aniline substituents X the potentials of the ligand-centered oxidation do not correlate with the electronic effects of X.