FT-IR INVESTIGATIONS OF BEDO-TTF AND RADICAL SALTS OF BEDO-TTF

We investigated powder absorption spectra of the donor BEDO-TTF and so me radical salts of BEDO-TTF, which are metals even at low temperature s. After an assignment of the bands in the neutral donor we found in t he radical salts different vibrational frequencies of bands correlated with C-O vibrations. These frequencies are directly related to the av erage charge on the donor molecule. Additionally frequencies of CH2-st retching vibrations exhibit differences, which can be ascribed to a va rying strength of donor-anion interaction depending on the respective anion.