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DOI: 10.1039/A700531H (Paper) Reference Section for: Chem. Commun., 1997, 1047-1048

Crystallization and X-ray structures of [NaYb(C5H5)3] and Yb(C5H5)2

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Christos Apostolidis, Glen B. Deacon, Ernst Dornberger, Frank T. Edelmann, Basil Kanellakopulos, Peter MacKinnon and Dietmar Stalke

Abstract

The complex [NaYb(C5H5)3] (C5H5 = cyclopentadienyl), prepared from Yb(C5H5)3 and sodium naphthalenide in tetrahydrofuran (thf) or from Yb(C5H5)2 and Na(C5H5) in tetrahydrofuran and crystallized at ca. 400 °C (<10-4 mm Hg), is a three-dimensional polymer in which µ-η5:η5-C5H5 groups link sodium and ytterbium (each metal having a pseudo-triangular arrangement of C5H5 ligands); Yb(C5H5)2, similarly crystallized, has a polymeric chain structure with one terminal and two bridging C5H5 ligands per ytterbium, and there is η1-bonding between adjacent chains.

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