First evidence for p-p dimerization of stable 1,4-dialkylquinoxalinium radical cations. Structure, spectroscopy, and magnetism. Zeitschrift fuer Naturforschung, B: A Journal of Chemical Sciences, (48)9:1181--1186, 1993. [PUMA: cation crystal diethyldihydro diethyldihydroquinoxaline electronic moment radical radical;magnetic radical;mol radical;quinoxaline ray;spectra structure x]