Ferric Compounds 4 Free Radicals 4 Hydrogen-Ion Concentration 4 Kinetics 4 Nitrogen Oxides 4 Raman spectrometry 4 aqueous solution 4 article 4 chemical reaction 4 nitroxyl derivative 4 pH 4 reduction 4 unclassified drug 4 Amines 2 Ammonia 2 Anaerobiosis 2 Catalysis 2 Catalyst activity 2 Catalytic disproportionation 2 Coordination reactions 2 Diazene 2 Ferrous Compounds 2 Hydroxylamine 2 Metalloporphyrins 2 Nitrogen 2 Nuclear magnetic resonance spectroscopy 2 Oxidation 2 Oxidation-Reduction 2 Reduction 2 Spectrophotometry, Ultraviolet 2