%0 Journal Article %1 Hausen.1989 %A Hausen, H. D. %A Kaim, Wolfgang %A Schulz, Andreas %A Roth, Eberhard. %D 1989 %J Zeitschrift fuer Naturforschung, B: A Journal of Chemical Sciences %K cation crystal diethylquinoxalinium radical radical;ESR radical;quinoxalinium salt salt;magnetism salt;mol structure %N 10 %P 1233--1238 %R 10.1515/znb-1989-1016 %T Structure and magnetism of stable cation radical salts: N,N'-diethylquinoxalinium tetraphenylborate as compared with pyrazinium and phenazinium analogs %V 44 %X Crystal and mol. structure anal. of N,N'-diethylquinoxalinium tetraphenylborate shows a virtually planar quinoxaline ring with 11 conjugated p electrons and approx. antiperiplanar Et groups. In comparison with phenazinium systems and N,N'-diethylpyrazinium cation, the quinoxalinium species adopts an intermediate position in terms of intra- and intermol. structural features. In particular, increasing benzannelation seems to favor a cation/anion approach for electrostatic reasons whereas the N-C bonds to the hyperconjugatively charge-delocalizing alkyl groups increase due to peri interactions. Solid-state magnetic and ESR measurements are compatible with the crystallog. detd. structure. on SciFinder(R)

@article{Hausen.1989, abstract = {Crystal and mol. structure anal. of N,N'-diethylquinoxalinium tetraphenylborate shows a virtually planar quinoxaline ring with 11 conjugated \textgreek{p} electrons and approx. antiperiplanar Et groups. In comparison with phenazinium systems and N,N'-diethylpyrazinium cation, the quinoxalinium species adopts an intermediate position in terms of intra- and intermol. structural features. In particular, increasing benzannelation seems to favor a cation/anion approach for electrostatic reasons whereas the N-C bonds to the hyperconjugatively charge-delocalizing alkyl groups increase due to peri interactions. Solid-state magnetic and ESR measurements are compatible with the crystallog. detd. structure. [on SciFinder(R)]}, added-at = {2022-06-15T11:26:56.000+0200}, author = {Hausen, H. D. and Kaim, Wolfgang and Schulz, Andreas and Roth, Eberhard.}, biburl = {https://puma.ub.uni-stuttgart.de/bibtex/27c5a2b8d4c3f5ff7656ba84dca2e8ea2/huebleriac}, doi = {10.1515/znb-1989-1016}, interhash = {0a2ae4bf130fb5d90a43f9d025ad115d}, intrahash = {7c5a2b8d4c3f5ff7656ba84dca2e8ea2}, issn = {0932-0776}, journal = {Zeitschrift fuer Naturforschung, B: A Journal of Chemical Sciences}, keywords = {cation crystal diethylquinoxalinium radical radical;ESR radical;quinoxalinium salt salt;magnetism salt;mol structure}, number = 10, pages = {1233--1238}, timestamp = {2022-06-15T09:26:56.000+0200}, title = {Structure and magnetism of stable cation radical salts: N,N'-diethylquinoxalinium tetraphenylborate as compared with pyrazinium and phenazinium analogs}, volume = 44, year = 1989 }