Trans influence in a mer-octahedral triiodidolanthanide: triiodidotris(tetrahydrofuran-κO)ytterbium(III)
International Union of Crystallography, 2009
Acta Crystallographica Section C
Volume 65, Issue 11, pages m422–m425, November 2009
How to Cite
Emge, T. J., Kornienko, A. and Brennan, J. G. (2009), Trans influence in a mer-octahedral triiodidolanthanide: triiodidotris(tetrahydrofuran-κO)ytterbium(III). Acta Cryst. C, 65: m422–m425. doi: 10.1107/S0108270109038268
The structure of the six-coordinate title complex, [YbI3(C4H8O)3], is the first mer-octahedral form of an LnI3L3 lanthanide (Ln) compound with neutral L ligands, and is closely related to that of several of the seven-coordinate LnX3L4 series of compounds, where X = Cl, Br or I and L = tetrahydrofuran (THF), isopropanol, pyridine or water. A structural trans effect can be assigned to YbI3(THF)3, in contrast to the LnX3L4 compounds, where steric and crystal packing effects are significant. The Yb—I bond lengths are 2.9543 (4) and 2.9151 (6) Å for I trans and cis to I, respectively, and the Yb—O bond lengths are 2.299 (5) and 2.251 (3) Å for O trans and cis to I, respectively. The crystal packing allows for six contact distances as weak C—H...I interactions in the range 3.10–3.24 Å. The title molecule has a crystallographic twofold axis passing through a THF O atom, the trans I atom and the Yb atom.