Physical Properties of Some ET-Based Organic Metals and Superconductors with Mercury Containing Anions

Because of mercury atoms capability of forming the compounds with various coordination, the application of the electrolytes with Hg containing anions in electrochemical oxidation of ET (bis(ethylenedithio)tetrathiafulvalene) results in the formation of ET salts with the anions of different composition. The properties of organic metals and superconductors are briefly described for three families: 1) ET 4 Hg 3-δ X 8 ((δ 0, and a series of other peculiarities. Shubnikov-de Haas oscillations were observed for some salts of (ET) 8 [Hg 4 X 12 (C 6 H 5 Y) 2 ] family. The possible types of Fermi surface are discussed for these salts.