%0 Journal Article %1 Hausen.1988c %A Hausen, Hans Dieter %A Schulz, Andreas %A Kaim, Wolfgang. %D 1988 %J Chemische Berichte %K cation pyrazinium quinoxalinium radical radical;crystal radical;mol stabilization;conjugation structure %N 11 %P 2059--2061 %T Electronic stabilization through 7-p electron conjugation in heterocycles. Molecular and crystal structure of an inert monocyclic radical cation %V 121 %X The 1,4-diethylpyrazinium (I) and -quinoxalinium cation radicals are more stable than methylviologen and phenazinium radical cations and do not show assocn. in concd. soln. or in the solid, as demonstrated by ESR and by a crystal structure anal. of I.BPh4-. Isolation of these unusually stable radical ions has been accomplished for the first time. Their persistence stands in contrast to conventional conceptions of radical stabilization which involve either steric shielding or extensive p electron delocalization over many p centers. on SciFinder(R)

@article{Hausen.1988c, abstract = {The 1,4-diethylpyrazinium (I) and -quinoxalinium cation radicals are more stable than methylviologen and phenazinium radical cations and do not show assocn. in concd. soln. or in the solid, as demonstrated by ESR and by a crystal structure anal. of I.BPh4-. Isolation of these unusually stable radical ions has been accomplished for the first time. Their persistence stands in contrast to conventional conceptions of radical stabilization which involve either steric shielding or extensive \textgreek{p} electron delocalization over many \textgreek{p} centers. [on SciFinder(R)]}, added-at = {2022-06-15T11:26:56.000+0200}, author = {Hausen, Hans Dieter and Schulz, Andreas and Kaim, Wolfgang.}, biburl = {https://puma.ub.uni-stuttgart.de/bibtex/21779e502e227c2ee374276aa8e6540c2/huebleriac}, interhash = {e4c9c3017e16fd332a4b94258f18aeac}, intrahash = {1779e502e227c2ee374276aa8e6540c2}, issn = {0009-2940}, journal = {Chemische Berichte}, keywords = {cation pyrazinium quinoxalinium radical radical;crystal radical;mol stabilization;conjugation structure}, number = 11, pages = {2059--2061}, timestamp = {2022-06-15T09:26:56.000+0200}, title = {Electronic stabilization through 7-\textgreek{p} electron conjugation in heterocycles. Molecular and crystal structure of an inert monocyclic radical cation}, volume = 121, year = 1988 }