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'Cobalt Complexes' in keywords Facet   Publication Year 2000  [X]
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1Author    Berthold Kersting, Gabriel SiedleRequires cookie*
 Title    Reactivity of Cobalt(III) Amine-Thiolate Complexes with Terminal and Bridging Thiolate Functions towards Hydrogen Peroxide  
 Abstract    The reactivity of Co111 amine-thiolate complexes with terminal and bridging thiolate func­ tions towards oxidizing agents has been investigated. The mononuclear Co N3S3 complex [Coni(L1)] (2) (H3L 1 represents the hexadentate ligand /V,jV',./V"-Tris(2-thio-benzyl)-1,1,1 -tris-(aminomethyl)ethane) featuring three terminal thiolate ligands, and the binuclear N3Com-(Ai-S)3ComN3 complex [Coni2(L2)]3+ (4) (H3L2 = N, A^/V''-Tris-[2-thio-3-aminomethyl-5-terr-butyl-benzyl]-l,l,l-tris(aminomethyl)ethane) featuring three bridging thiolates were selected. Hydrogen peroxide was the oxidizing agent. Whereas the thiolato-bridged complex 4 is resis­ tant towards oxidation by hydrogen peroxide, 2 undergoes a ligand-based oxidation reaction to give the amine-sulfinate complex [Co(L'')] 5, where all three terminal thiolates have been oxidized to sulfinates without gross structural changes of the parent complex 2. In contrast to 4, the cyclic voltammogram of 2 reveals an irreversible oxidation wave at E = +0.52 V vs SCE which can be attributed to a ligand-centered oxidation reaction. 4 and 5 have been structurally characterized by X-ray crystallography. 
  Reference    Z. Naturforsch. 55b, 1179—1187 (2000); received August 17 2000 
  Published    2000 
  Keywords    Cobalt Complexes, Amine-Thiolate Ligands, Sulfinate Complexes 
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 TEI-XML for    default:Reihe_B/55/ZNB-2000-55b-1179.pdf 
 Identifier    ZNB-2000-55b-1179 
 Volume    55