Novel Electron Acceptors for Organic Conductors: 1,2-Bis(p-benzoquino)- 3-(2(dicyanomethylene)-2,5-thienoquino)cyclopropane Derivatives.

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.