Structural and physical properties of /spl theta/-(BEDT-TTF)/sub 2/Cu/sub 2/(CN)[N(CN)/sub 2/]/sub 2/

Summary form only given. In searching for the BEDT-TTF superconductors with polymerized anion of X/sup -/-M/sup +/-X/sup -/ type, where X/sup -/ and M/sup +/ represent the pseudo-halogen and trircoordinative transition metal respectively, we have recently obtained two new superconductors, /spl kappa/-(BEDT-TTF)/sub 2/Cu(CN)[N(CN)/sub 2/] and /spl kappa/´-(BEDT-TTF)/sub 2/Cu/sub 2/(CN)/sub 3/. During the crystal growth of these salts, the title compound was obtained simultaneously. We will report on the structural, transport, and magnetic properties of these BEDT-TTF salts.