trans-Di­iodo­pentakis­(tetra­hydro­furan)­ytterbium(III) tetra­iodo-trans-bis­(tetra­hydro­furan)­ytterbium(III)

The ionic title complex, [YbI₂(thf)₅][YbI₄(thf)₂], was obtained by oxidation of the aryl­ytterbium(II) iodide DppYbI(thf)₃ (Dpp = 2,6-Ph₂C₆H₃) with neo­pentyl iodide. In the pentagonal-bipyramidal coordinated cation [Yb—I = 2.9366 (9) Å and Yb–O = 2.340 (6), 2.347 (8) and 2.365 (6) Å], a twofold rotation axis passes through the Yb atom, the O atom and the midpoint of the C—C bond of one of the thf ligands. The centrosymmetric anion shows an almost regular coordination octahedron [Yb—I = 2.9641 (8) and 2.9856 (9) Å, and Yb—O 2.279 (6) Å].