title: Ru(III)(edta) mediated oxidation of azide in the presence of hydrogen peroxide. Azide versus peroxide activation.
abstract: The [Ru(III)(edta)(H2O)](-) (edta(4-) = ethylenediaminetetraacetate) complex catalyzes the oxidation of azide (N3(-)) with H2O2, mimicking the action of metallo-enzymes such as catalase and peroxidase in biochemistry. The kinetics of the catalytic oxidation process was studied by using stopped-flow and rapid-scan spectrophotometry as a function of [Ru(III)(edta)], [H2O2], [N3(-)] and pH. The catalytic activity of the different oxidizing species produced in the reaction of [Ru(III)(edta)(H2O)](-) with H2O2 for the oxidation of azide was compared to the oxidation of coordinated azide in [Ru(III)(edta)N3](2-) by H2O2. Detailed reaction mechanisms in agreement with the spectroscopic and kinetic data are presented for both reaction paths.
authors.affiliation: Chemistry and Biomimetics Group, CSIR-Central Mechanical Engineering Research Institute, MG Avenue, Durgapur-713209, India. dchat57@hotmail.com.
authors.forename: Debabrata
authors.initials: D
authors.lastname: Chatterjee
authors.forename: Alicja
authors.initials: A
authors.lastname: Franke
authors.forename: Maria
authors.initials: M
authors.lastname: Oszajca
authors.forename: Rudi
authors.initials: R
authors.lastname: van Eldik
mesh_terms: D001386:Azides / Q000737:chemistry*; D002384:Catalysis; D056831:Coordination Complexes / Q000737:chemistry*; D004492:Edetic Acid / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D010084:Oxidation-Reduction; D012428:Ruthenium / Q000737:chemistry*
chemical_list: D001386:Azides; D056831:Coordination Complexes; D012428:Ruthenium; D004492:Edetic Acid; D006861:Hydrogen Peroxide