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1989 (1)
1Author    S., C.E A —c E N G RenobleRequires cookie*
 Title    Struktur und Magnetismus stabiler Radikalkation-Salze: N,N'-Diethylchinoxalinium Tetraphenylborat im Vergleich mit Pyrazinium-und Phenazinium-Analogen  
 Abstract    tructure and M agnetism of Stable C ation R adical Salts: N ,N '-D iethylquinoxalinium T etra p h en y lb o rate as C o m p ared w ith Pyrazinium and Phenazinium A nalogues H .-D . H au sen 3, W olfgang K aim a *, A nd reas Schulz3 und E b e rh a rd R o th 3 b Crystal and m olecular structure analysis o f N ,N '-diethylquinoxalinium tetraphenylborate shows a virtually planar quinoxaline ring with 1 1 conjugated .t electrons and approxim ately antiperipla-nar ethyl groups. In comparison with the benzo-analogous phenazinium system s and the de-benzo derivative N.N'-diethylpyrazinium cation, the quinoxalinium species adopts an interm ediate posi­ tion in terms o f intra-and intermolecular structural features. In particular, increasing benzanella-tion seem s to favour a cation/anion approach for electrostatic reasons w hereas the N —C bonds to the hyperconjugatively charge delocalizing alkyl groups increase due to peri interactions. Solid state magnetic and ESR measurements are com patible with the crystallographically determined structure. 
  Reference    Z. Naturforsch. 44b, 1233 (1989); eingegangen am 27. April 1989 
  Published    1989 
  Keywords    H eterocycles, Radical Cations, Structure, M agnetism E SR Spectra 
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 TEI-XML for    default:Reihe_B/44/ZNB-1989-44b-1233.pdf 
 Identifier    ZNB-1989-44b-1233 
 Volume    44