Structure and conductivity of unsymmetrical π-donor ethylenedithiodithiadiselenafulvalene iodomercurate (EDT-DTDSF)4Hg3I8

New charge transfer salt of Se-containing unsymmetrical donor ethylenedithiodithiadiselenafulvalene (EDT-DTDSF) with iodomercurate anion, β-(EDT-DTDSF)4Hg3I8, has been synthesized. The structure of β-(EDT-DTDSF)4Hg3I8 has been determined from single-crystal X-ray analysis, which reveals alternating conducting donor layers of the β-type packing with insulating layers formed by infinite chains of [Hg2I6]2− anions and HgI2 molecules. Transport properties have been investigated.