| | 1 | Author
| S., C.E A —c E N G Renoble | Requires 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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| 44 | |
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