Redox Potential‐structure Relationships in Coordination Compounds

Abstract

The sections in this article are Introduction Redox Potential Parameterization Pickett's and Derived Models The Ligand Parameter P L and Metal Center Parameters E s and β Extensions of the Model Other Relationships Lever's Model The Ligand Parameter E L and the Metal Center Parameters S M and I M Extensions of the Model Other Relationships Bursten's Model Final Comments

Syntheses, Molecular Structures, Electrochemical Behavior, Theoretical Study, and Antitumor Activities of Organotin(IV) Complexes Containing 1-(4-Chlorophenyl)-1-cyclopentanecarboxylato Ligands

“…In accord with the weaker electron-donor character of phenyl relatively to alkyl groups, the reduction potential values for the phenyl complexes 5 and 6 (−0.99 and −0.94 V vs SCE, respectively) are less cathodic than those of the alkyl complexes 1 – 4 . The dependence of the redox potential of a complex on the electronic properties of its ligands has been well documented. − …”

Switching between κ2and κ3Bis(pyrazol-1-yl)acetate Ligands by Tuning Reaction Conditions: Synthesis, Spectral, Electrochemical, Structural, and Theoretical Studies on Arene-Ru(II) Derivatives of Bis(azol-1-yl)acetate Ligands

“…The redox properties of the compounds have been investigated by cyclic voltammetry, at a Pt disk electrode, in a 0.2 M [ n Bu 4 N][BF 4 ]/CH 3 CN solution, at 25 °C. They exhibit a single-electron (reversible, quasi-reversible, or irreversible) oxidation wave that is assigned − to the Ru II → Ru III oxidation, at the half-wave (or half-peak for an irreversible wave) oxidation potential values ( E 1/2 ox or E p/2 red , respectively) given in Table .…”

“…The parametrization of the redox potential of coordination compounds toward the quantification of electronic properties of ligands and binding metal centers is a subject of current attention. − ,, In particular the electrochemical Lever E L ligand parameter constitutes a measure of the electron donor character of a ligand (the stronger this character, the lower is E L ). On the basis of the Lever linear relationship (eq ), valid for octahedral-type complexes, which relates the redox potential (V vs NHE) with the sum of the E L values for all of the ligands (∑ E L ), we propose the estimation of E L for the bis(pyrazol-1-yl)acetate ligands of this study, as well as for the 4-acyl-5-pyrazolonate ligands we have studied before in related areneruthenium complexes, by assuming that expression is also valid for half-sandwich benzene-type complexes.…”