Studies on new tetrathiafulvalene (TTF) donors. Synthesis and characterization

A series of new tetrathiafulvalene (TTF) derivatives and related compounds with halogen substituents were synthesized. The compounds were characterized by elemental analysis, 1H NMR spectra, electron ionization (EI) or negative-ion fast atom bombardment mass spectra (FAB-MS) analysis, Fourier transform infrared (FT-IR) spectra and UV–Vis spectral analysis. The electronic absorption spectral studies on the new TTF derivatives revealed that the energy differences between the π-orbitals of the new TTF derivatives were smaller than that between BEDT–TTF (bis(ethylenedithio)–tetrathiafulvalene).