Kalium-μ-dithio-bis(pentacyanokobaltat(III)) und Kalium-μ-diseleno-bis(pentacyanokobaltat(III))

Potassium-μ-dithio-bis(pentacyanocobaltate(III)) and Potassium-μ-diseleno-bis(pentacyanocobaltate(III)) The oxidation of Co(CN)₅]^3? by sulfur or selenium leads to the complexes Co₂S₂(CN)₁₀]^6? and Co₂Se₂(CN)₁₀]^6?, respectively, which have been isolated as potassium salts K₆Co₂S₂(CN)₁₀] · 4 H₂O and K₆Co₂Se₂(CN)₁₀] · 5 H₂O. The μ-dithio complex has also been formed from Co(CN)₅]^3? with polysulfide, from CoOH(CN)₅]^3? with H₂S + O₂ and from Co₂O₂(CN)₁₀]^6? with H₂S. As shown by their vibrational spectra the new complexes contain bridges Co? S? S? Co and Co? Se? Se? Co, respectively.