Abstract
Abstract Bis- and tris-fused π-electron donors containing one or two vinylogous 1,3-dithiole[5]radialene unit (7–10) were successfully synthesized. Cyclic voltammetry revealed that the first redox waves of 7–10 correspond to simultaneous four-electron or eight-electron redox processes because of significant contribution of the moieties of vinylogous 1,3-dithiole[5]radialene exhibiting a simultaneous four-electron redox. The UV–vis–NIR spectra of the oxidative species of 7–10 generated by constant voltages exhibited absorption bands attributed to (7–9)2+ and 104+ with structures of dicationic 1,3-dithiole[5]radialene vinylogs.
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