Crystal structures and conducting properties of various cation-radical salt
s with peri-ditellurium bridges, 2,3-DMTTeA and TMITeN were examined. The e
lectrical conductivity and the magnetic susceptibility measurements show th
at (TMTTeN)(2)Ag(CN)(2) is metallic down to low temperature. It is the firs
t pure organic ii conductor having stable metallic state and quasi-3D tight
-binding Fermi surfaces.