Ruthenium article electron spin resonance ligand nitric oxide ruthenium Anisotropy Chlorine compounds Crystallography, X-Ray Density functional calculations EPR spectroscopy Electrochemistry Electrolysis Electrolytic reduction Electron Spin Resonance Spectroscopy Electronic structure IR spectroelectrochemistry Iridium Ligands Metalloporphyrins Nitric Oxide Nitric oxide Nitrogen oxides Oxidation Oxidation-Reduction Paramagnetic resonance Probability density function Quantum Theory Radical complexes Reduction-induced dissociation