Synthesis and structure of [Ni4(S2C7H10)4], the first tetranuclear cyclic nickel complex with bifunctional thiolate ligands and of the mononuclear precursor compound Na2[Ni(S2C7H10)2]·4MeOH·iPrOH

[Ni4(S2C7H10)4], the first tetranuclear cyclic nickel(II) complex with bifunctional thiolate ligands, is described. It has been obtained by oxidation of the mononuclear precursor complex [Ni(S2C7H10)2]2−.