Abstract
The electrochemical behaviour of iron(II), nickel(II) and copper(II) complexes with a number of derivatives of the pentadentate ligand bis(salicylideneimine-3-propyl)amine (X-SALRDPT) has been investigated in non-aqueous solvent. The one-electron anodic oxidation of all the metal(II) complexes has been characterized and correlated, as well as the frequency shifts of their d–d transitions, to the inductive effect of the various substituents on the salicylic moieties. Crystal field stabilization energies involved in the redox change are discussed. The cathodic charge transfer II/I and I/0 for nickel(II) and copper(II) chelates have been also investigated. On the basis of electrochemical measurements, some considerations on the reactivity of the complexes towards dioxygen are made.
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