Di-μ-chlorido-μ-(dimethyl sulfide)-bis­{dichlorido[(dimethyl selenide-κSe)(dimethyl sulfide-κS)(0.65/0.35)]niobium(III)}(Nb—Nb)

The dinuclear compound, [Nb₂Cl₆(C₂H₆S)_1.7(C₂H₆Se)_1.3], features an Nb^III=Nb^III double bond [2.6878 (5) Å]. The mol­ecule lies on a twofold rotation axis that passes through the middle of this bond as well as through the bridging dimethyl sulfide ligand. The Nb^III ion exists in an octa­hedral coordination environment defined by two terminal and two bridging Cl atoms, and (CH₃)₂Se/(CH₃)₂S ligands. The (bridging) ligand lying on the twofold rotation axis is an ordered (CH₃)₂S ligand, whereas the terminal ones on a general position are a mixture of (CH₃)₂Se and (CH₃)₂S ligands in a 0.647 (2):0.353 (2) ratio (the methyl C atoms are also disordered).