Charge transfer salts based on Cu(qdt)2, Ni(qdt)2 and Au(qdt)2 anions

Metal bis(quinoxaline-2,3-dithiolate) complexes, M(qdt)(2), were used as counterions of radical-cation salts commonly employed in the preparation of one-dimensional conductors. We report the synthesis of the new complex Au(qdt)(2)(-) as the tetraphenylphosphonium salt and the preparation of (bedl-ttf)M(qdt)(2), (tmtsf) M(qdt)(2) and (ttf)M(qdt)(2) with M=Au and Cu, and (ttf)(3)[Ni(qdt)(2)](2) Their electrical conductivity and thermoelectric power were measured showing in all cases activated behaviour, with room temperature values of a ranging from 10(-7) to 10(-3) S cm(-1), the highest value being for (bedt-ttf)Au(qdt)(2) which has a gap 2 Delta=0.32 eV. Preliminary E.S.R results for (ttf)Cu(qdt)(2) are also presented.