Synthesis and electrochemical properties of bis(3,4-furyldimethylthio)tetrathiafulvalene and other tetrathiafulvalene donors with eight-membered heterocycles

Bis(3,4-furyldimethylthio)tetrathiafulvalene, bis(but-2-ene-1,4-dithio)tetrathiafulvalene and bis(2,3-dimethylbut-2-ene-1,4-dithio)-tetrathiafulvalene are synthesized in high yield from tetrakis(cyanoethylthio)tetrathiafulvalene and primary alkyl halides. Electrochemical properties are compared and the new donors are related to analogous quasi-one-dimensional organic metals.