Novel electron acceptors for organic conductors: 1,2-bis(p-benzoquino)-3-[2-(dicyanomethylene)-2,5-thienoquino]cyclopropane derivatives

Abstract

The title [3]radialene derivatives, having a hybrid structure of 2,5-bis(dicyanomethylene)-2,5-dihydrothiophene (thiophene–TCNQ) and tris(p-benzoquino)cyclopropane, and giving a stable radical anion and a dianion on two-step one-electron reductions, have been efficiently synthesised and the electrical properties of the conductive charge-transfer complexes with tetrathiafulvalene and related donors are described.