X-ray crystal structure and electrical conductivity of [Pt(2,2′-bipyridine)(C8H4S8)][BF4] [C8H4S8 2−=2-{(4,5-ethylenedithio)-1,3-dithiole-2-ylidene}-1,3-dithiole-4,5-dithionate(2-)]

[Pt(bpy)(C8H4S8)][BF4] (bpy=2,2′-bipyridine; C8H4S8 2−=2-{(4,5-ethylenedithio)-1,3-dithiole-2-ylidene}-1,3-dithiole-4,5-dithionate(2-)) was prepared by current-controlled electrolysis of a dichloromethane solution of [Pt(bpy)(C8H4S8)] with [NEt4][BF4] as an electrolyte. The X-ray crystal structure analysis revealed a columnar stacking of the one-electron oxidized, cationic moieties with some S–S non-bonded contacts (<3.7 Å) as well as an S–S layered interaction in another direction. The electrical conductivity measured for a compacted pellet was 5.0×10−3 S cm−1 at room temperature with activation energy of 0.05 eV. The energy band calculation of the oxidized species showed an essentially one-dimensional electron-conduction through the column.