title: Structural characterization of a hydroperoxo nickel complex and its autoxidation: mechanism of interconversion between peroxo, superoxo, and hydroperoxo species.
abstract: Pincer-stabilized nickel(I) complexes readily react with molecular oxygen to form dinuclear 1,2-μ-peroxo-bridged nickel(II) complexes, which are the major components of a dynamic equilibrium with the corresponding mononuclear superoxo species. The peroxo complexes further react with hydrogen peroxide to give the corresponding nickel(II) hydroperoxides. One of these hitherto elusive species was characterized by X-ray diffraction for the first time [O-O bond length: 1.492(2) Å].
authors.affiliation: Anorganisch-Chemisches Institut, University of Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg (Germany).
authors.forename: Christoph A
authors.initials: CA
authors.lastname: Rettenmeier
authors.forename: Hubert
authors.initials: H
authors.lastname: Wadepohl
authors.forename: Lutz H
authors.initials: LH
authors.lastname: Gade
mesh_terms: D056831:Coordination Complexes / Q000138:chemical synthesis / Q000737:chemistry*; D018360:Crystallography, X-Ray; D006861:Hydrogen Peroxide / Q000737:chemistry*; D008968:Molecular Conformation; D009532:Nickel / Q000737:chemistry*; D010084:Oxidation-Reduction; D013059:Spectrum Analysis, Raman
chemical_list: D056831:Coordination Complexes; D009532:Nickel; D006861:Hydrogen Peroxide
keywords: autoxidation; hydroperoxides; nickel; peroxides; pincer ligand