trans‐Tetrachlorobis(N,N′‐dimethyl­imidazolidine‐2‐thione)tellurium(IV), a thiourea complex of tellurium with asymmetric Te—S bonds

The structure of the title compound, TeCl₄(C₅H₁₀N₂S)₂] or C₁₀H₂₀Cl₄N₄S₂Te, has been solved in order to study the stereochemical activity of the lone pair of electrons on Te^IV. The two crystallographically independent mol­ecules in the asymmetric unit both show a distorted octahedral coordination of the Te atom. The two Te—S bonds are trans to each other in both mol­ecules and are greatly asymmetric, with bond lengths of 2.5686 (7) versus 2.8557 (8) Å and 2.5859 (7) versus 2.8165 (9) Å. The Te—Cl bond lengths lie in the range 2.5236 (7)–2.5589 (8) Å. The asymmetric Te—S bonds and a large S—Te—Cl angle of ca 97° involving the long Te—S bonds indicate stereochemical activity of the lone pair of electrons on Te.