Hexaaquacobalt(II) bis(2,2′-sulfanediyldiacetato-κ3O,S,O′)cobaltate(II) tetrahydrate

The two CoII atoms in the title salt, [Co(H2O)6][Co(C4H4O4S)2]·4H2O, exist in an octahedral coordination environment. In the cation, the Co atom is surrounded by six water molecules, and in the anion, it is bis-O,S,O′-chelated by the thioacetate ligands. The cations, anions and uncoordinated water molecules are linked by O—H...O hydrogen bonds into a three-dimensional network.