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'a Iminoketones' in keywords Facet   section ZfN Section B:Volume 042  [X]
Facet   Publication Year 1987  [X]
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1Author    Sylvia Ernst, Volker Kasack, Christian Bessenbacher, Wolfgang KaimRequires cookie*
 Title    Ein-und zweikernige Bis(2,2'-bipyridyI)ruthenium-Komplexe mit N,0-Mode!liganden für Dehydrogenase-Cofaktoren Mono-and Binuclear Bis(2,2'-bipyridine)ruthenium Complexes with N,0-Ligands Modelling Dehydrogenase Cofactors  
 Abstract    Coordination of substitutionally inert [Ru(bpy) 2 ] 2+ fragments (bpy: 2,2'-bipyridine) to the a-iminoketone chelate ligands pyrazine-2-dimethylcarboxamide (4) and 4,7-phenanthroline-5,6-dione (5) yields the complexes [(N,0-4)Ru(bpy) 2 ] 2 ®, [(0,0'-5 e)Ru(bpy) 2 ]® and {(N,0; N',0'-5)[Ru(bpy) 2 ] 2 } 4 ® which exhibit a rich electrochemistry. The distinctly different electronic structures of the complexes are evident from the ESR behaviour of paramagnetic intermediates: N.O-coordinated complexes have the unpaired electron residing in the ligand n system upon reduction, albeit with g<2 for the complex of 4 but with g>2 for the binuclear complex of 5. The paramagnetic 0,0'-coordinated mononuclear complex with 5 has its redox potentials shifted positively relative to that of the binuclear system. These results are particularly noteworthy because 4 and 5 can be regarded as model compounds for the flavin and methoxatin dehydrogenase cofactors. 
  Reference    Z. Naturforsch. 42b, 425—430 (1987); eingegangen am 6. August 1986 
  Published    1987 
  Keywords    Dehydrogenase Cofactors, Ruthenium Complexes, Oxidation States, ESR Spectra, a-Iminoketones 
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 TEI-XML for    default:Reihe_B/42/ZNB-1987-42b-0425.pdf 
 Identifier    ZNB-1987-42b-0425 
 Volume    42