Crystal structure of the [(THF)Cs(μ-η5 :η5 -Cp')3 Yb] n oligomer

Acta Crystallographica. Section E, Crystallographic Communications
Daniel N HuhWilliam J Evans

Abstract

The green compound poly[(tetra-hydro-furan)-tris-[μ-η5:η5-1-(tri-methyl-sil-yl)cyclo-penta-dien-yl]caesium(I)ytterbium(II)], [CsYb(C8H13Si)3(C4H8O)] n or [(THF)Cs(μ-η5:η5-Cp')3YbII] n was synthesized by reduction of a red THF solution of (C5H4SiMe3)3YbIII with excess Cs metal and identified by X-ray diffraction. The compound crystallizes as a two-dimensional array of hexa-gons with alternating CsI and YbII ions at the vertices and cyclo-penta-dienyl groups bridging each edge. This, based off the six-electron cyclo-penta-dienyl rings occupying three coordination positions, gives a formally nine-coordinate tris-(cyclo-penta-dien-yl) coordination environment to Yb and the Cs is ten-coordinate due to the three cyclo-penta-dienyl rings and a coordinated mol-ecule of THF. The complex comprises layers of Cs3Yb3 hexa-gons with THF ligands and Me3Si groups in between the layers. The Yb-C metrical parameters are consistent with a 4f14 YbII electron configuration.

References

Jul 20, 2005·Chemical Communications : Chem Comm·Octavio González-del MoralCristina Santamaría
Dec 25, 2007·Acta Crystallographica. Section A, Foundations of Crystallography·George M Sheldrick
Jan 15, 2008·Angewandte Chemie·Peter B HitchcockAndrey V Protchenko
May 24, 2013·Journal of the American Chemical Society·Matthew R MacDonaldWilliam J Evans
Dec 30, 2014·Acta Crystallographica. Section A, Foundations and Advances·George M Sheldrick
Jan 9, 2015·Acta Crystallographica. Section C, Structural Chemistry·George M Sheldrick
Apr 7, 2016·Acta Crystallographica Section B, Structural Science, Crystal Engineering and Materials·Colin R GroomSuzanna C Ward
Oct 24, 2017·Chemistry : a European Journal·Safaa H AliJun Wang

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