Synthesis and properties of 1,3-dithiole[4]dendralenes, in which two thiophene rings are inserted

Abstract

Novel 1,3-dithiole[4]dendralene derivatives 3 with two thiophene spacers were synthesized. Cyclic voltammetry and spectroelectrochemistry suggested the dications of most derivatives of 3 have dimeric thiophenequinoid radical cation structures, while etramethyltetrakis(methoxycarbonyl) derivative 3Bd adopts a vinylogous TTF dication structure. © 2011 The Chemical Society of Japan.