ET salt with [Cu(I)Hg(II)] containing anion

Summary form only given. The oxidation of ET in the presence of CuSCN + Hg(SCN) + RSCN + crown ether electrolyte is investigated for the preparation of ET salts, in which an inorganic layer contains Cu(I) and Hg(II). It is established, that varying Hg:Cu:SCN ratio one can obtain 1) crystals of the superconductor (ET)/sub 2/CU(NCS)/sub 2/ with a sharp superconducting transition at T/sub c/ =10.4 K 2) crystals with a metallic conductivity down to 20 K 3) crystals of ET/sub 5/[CuHg(SCN)/sub 4/]/sub 2/ with a semiconducting behavior. The composition and the structure of the latter is determined by using X-ray analysis. It was found that ET layers contain the stacks composed of 5 independent cation-radicals. These layers alter with the anion layers, which contain polymerized -(Cu-NCS-Hg)- chains with an elementary (Hg(SCN)/sub 4/Cu)/sub n/- unit. All Hg and Cu atoms form covalent bonds with SCN ligand.