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Crystal structure of the [(THF)Cs(?-?5:?5-Cp')3Yb] n oligomer.

ABSTRACT: The green compound poly[(tetra-hydro-furan)-tris-[?-?5:?5-1-(tri-methyl-sil-yl)cyclo-penta-dien-yl]caesium(I)ytterbium(II)], [CsYb(C8H13Si)3(C4H8O)] n or [(THF)Cs(?-?5:?5-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 4f 14 YbII electron configuration.

SUBMITTER: Huh DN 

PROVIDER: S-EPMC7336790 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature

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Crystal structure of the [(THF)Cs(μ-η<sup>5</sup>:η<sup>5</sup>-Cp')<sub>3</sub>Yb] <sub><i>n</i></sub> oligomer.

Huh Daniel N DN   Ziller Joseph W JW   Evans William J WJ  

Acta crystallographica. Section E, Crystallographic communications 20200623 Pt 7

The green compound poly[(tetra-hydro-furan)-tris-[μ-η<sup>5</sup>:η<sup>5</sup>-1-(tri-methyl-sil-yl)cyclo-penta-dien-yl]caesium(I)ytterbium(II)], [CsYb(C<sub>8</sub>H<sub>13</sub>Si)<sub>3</sub>(C<sub>4</sub>H<sub>8</sub>O)] <sub><i>n</i></sub> or [(THF)Cs(μ-η<sup>5</sup>:η<sup>5</sup>-Cp')<sub>3</sub>Yb<sup>II</sup>] <sub><i>n</i></sub> was synthesized by reduction of a red THF solution of (C<sub>5</sub>H<sub>4</sub>SiMe<sub>3</sub>)<sub>3</sub>Yb<sup>III</sup> with excess Cs metal and identif  ...[more]

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