Bis(μ-cobaltoceniumseleno-late-1:2κ(2) Se:Se)bis[bis-(cobaltoceniumseleno-late-κSe)mercury(II)] tetra-kis-(hexa-fluorido-phosphate) aceto-nitrile disolvate.

The title compound, [Co(6)Hg(2)(C(5)H(5))(6)(C(5)H(4)Se)(6)](PF(6))(4)·2CH(3)CN or [Hg(2)(CcSe)(6)][PF(6)](4)·2CH(3)CN (Cc = C(10)H(9)Co), was obtained as bright-orange needle-shaped crystals. It is a salt containing a tetra-cationic dimercury species with six cobaltoceniumseleno-late ligands, four hexa-fluorido-phosphate counter-ions and two aceto-nitrile solvent mol-ecules. The cation (point group ) has a bi-tetra-hedral {Hg(2)Se(6)} core with two bridging Se atoms and four terminal Se atoms.