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'Crown Ether' in keywords Facet   section ZfN Section B  [X]
Facet   Publication Year 1987  [X]
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1Author    FranzL. Dickert, MichaelW. VonendRequires cookie*
 Title    Konkurrierende Koordination von Kronenethern, Perchloratanionen und Lösungsmittelmolekülen am Co(II)-Ion — Eine Leitfähigkeits-und NMR-Studie in Nitromethan Anions and Solvent Molecules at Co(II)-Ions — A Conductivity and NMR Study on Nitromethane  
 Abstract    The 1:1 complexes between Co(II) and the crown ethers dibenzo[24]crown-8, dibenzo[18]-crown-6 and [18]crown-6 show a molar conductivity in nitromethane which indicates coordination of even Perchlorate anions. The substitution of this anion by solvent molecules can be monitored by conductometric titrations. This procedure reveals that dibenzo[24]crown-8 and [18]crown-6 is a potent five dentate ligand whereas dibenzo[18]crown-6 strongly coordinates only via three donor atoms. The mixed complexes with crown ether and methanol show strong outer-sphere associa-tion with the Perchlorate anions, which can be confirmed by investigations with [15]crown-5 complexes. 
  Reference    (Z. Naturforsch. 42b, 42—46 [1987]; eingegangen am 15. August/17. Oktober 1986) 
  Published    1987 
  Keywords    Crown Ether, Complex Formation Ionic Conductivity, NMR Spectra 
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 TEI-XML for    default:Reihe_B/42/ZNB-1987-42b-0042.pdf 
 Identifier    ZNB-1987-42b-0042 
 Volume    42