Bisdithiolene complexes based on an extended ligand with TTF and pyridine moieties

The synthesis and characterization of a new extended tetrathiafulvalene (TTF) dithiolene ligand substituted with alkyl pyridine groups, pyridylethylsulfanyltetrathiafulvalenedithiolene (pesdt2−), as well as the corresponding gold (III) complex [Au(pesdt)2]− obtained as a tetrabutylammonium salt are described. The oxidation potential of this complex is rather low and the paramagnetic neutral complex is obtained as an electrically insulating microcrystalline powder.