Bis(phenylenedithlo)tetrathiafulvalene (BPhDT-TTF): Synthesis and properties of a new π-donor for organic metals

The new π-donor bis(phenylenedithio)tetrathiafulvalene (7), synthesized via phosphite coupling of 2-oxo-1,3-dithiolo[4,5 b][1,4]benzodithiin (6) has been prepared in five steps starting from dimercaptobenzene (1) and chloroactyl chloride (2). Spectroscopic and electrochemical data of 7 are presented. Electrocrystallization yielded highly conducting radical cation salts (σRT = 100 S/cm) as fibers (typical dimensions: 10000x 50x20μm). Structural aspects, obtained on these salts by microdifraction techniques, will be discussed.