ESR of the Trianion and Anion Radicals of Benzo[g][1,2,5]thiadiazolo[3,4-b]-quinoxaline-5,10-dione and Its Selenium Analogue

The anion and trianion radicals of title compounds were generated by electrolysis in acetonitrile at room temperature and their ESR spectra were measured, which can be identified on the basis of π-MO calculations of hfsc’s.