Redox reactions of a pyrazine-bridged Ru^III(edta) binuclear complex: spectrochemical, spectroelectrochemical and theoretical studies

Abstract

The redox reactions of a pyrazine bridged binuclear [(edta)RuIIIpzRuIII(edta)]2- (edta4− = ethylenediaminetetraacetate; pz = pyrazine) have been investigated spectrochemically and spectroelectrochemically for the first time. The kinetics of the reduction...

Self-Assembled Tetranuclear Square Complex of Chromium(III) Bridged by Radical Pyrazine: A Molecular Model for Metal–Organic Magnets

“…Alternatively, radical ligands can lead to high delocalization and facilitate strong magnetic interactions owing to their partially filled orbitals. Hence, the metal-radical approach has been extensively used in the field of molecular magnetism, where organic radicals are typically isolated before their subsequent assembly with metal ion centers. , Frequently, radical ligands have also been introduced through post-synthetic redox treatment of complexes and materials containing closed-shell ligands. − An alternative, however, to save time, reactants, and reduce chemical waste, is to explore the possibility of in-situ redox processes between the metal ion and the ligand during the synthesis. By rationally selecting the metal/ligand pair based on their respective redox properties, both energies and overlaps of magnetically relevant molecular orbitals (MOs) can be tuned to attain the desired magnetic and transport properties. − Through this approach, molecule-based magnets with critical temperatures above room temperature have been obtained from the tetracyanoethylene (TCNE) radical and its analogues. − …”