Tetrahydrofuran Adducts of a Chlorobismuthate(III) Anion and Antimony Triiodide

Tetrahydrofuran (thf) adducts of a chlorobismuthate(III) anion and of antimony triiodide have been prepared and characterized by X-ray crystallography. The former compound, bis[tetrakis(tetrahydrofuran-O)lithium(I)] di-μ-chloro-bis[trichloro(tetrahydrofuran-O)bismuthate(III)], [Li(C₄H₈O)₄]₂[Bi₂Cl₈(C₄H₈O)], contains centrosymmetric edge-shared bi-octahedral dianions with the formula [Bi₂Cl₆(thf)₂(μ-Cl)₂]²⁻ in which the thf ligands occupy terminal sites at 90° to the Bi₂(μ-Cl)₂ plane; the cations are [Li(thf)₄]⁺. The latter structure, triiodo(tetrahydrofuran-O)antimony(III), [SbI₃(C₄H₈O)], comprises a polymeric arrangement of SbI₃(thf) units, the antimony centres bridged alternately by pairs of I atoms and pairs of thf ligands.

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