Struktur und Magnetismus stabiler Radikalkation-Salze: N,N'-Diethylchinoxalinium Tetraphenylborat im Vergleich mit Pyrazinium- und Phenazinium-Analogen

Crystal and molecular structure analysis of N,N'-diethylquinoxalinium tetraphenylborate shows a virtually planar quinoxaline ring with 11 conjugated π electrons and approximately antiperiplanar ethyl groups. In comparison with the benzo-analogous phenazinium systems and the de-benzo derivative N,N'-diethylpyrazinium cation, the quinoxalinium species adopts an intermediate position in terms of intra- and intermolecular structural features