Synthesis of Tris[5-(3,5-di-t-butyl-4-hydroxyphenyl)-2-thienyl]cyclopropenylium Ion and Its Transformation into the Fully π-Conjugated Dianion

Reaction of trichlorocyclopropenylium ion with 2,5-di-t-butyl-4-(2-thienyl)phenol affords the titled cation, which can be transformed into the fully π-conjugated dianion.