Synthesis of rare-earth-metal-in-cryptand dications, [Ln(2.2.2-cryptand)]2+, from Sm2+, Eu2+, and Yb2+ silyl metallocenes (C5H4SiMe3)2Ln(THF)2

Daniel N. Huh; Christopher M. Kotyk; Milan Gembicky; Arnold L. Rheingold; Joseph W. Ziller; William J. Evans

doi:10.1039/C7CC04396A

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Synthesis of rare-earth-metal-in-cryptand dications, [Ln(2.2.2-cryptand)]²⁺, from Sm²⁺, Eu²⁺, and Yb²⁺ silyl metallocenes (C₅H₄SiMe₃)₂Ln(THF)₂†

Daniel N. Huh,

^a Christopher M. Kotyk,

^a Milan Gembicky,

^b Arnold L. Rheingold,^b Joseph W. Ziller

^a and William J. Evans

*^a

Author affiliations

* Corresponding authors

^a Department of Chemistry, University of California-Irvine, Irvine, California 92697, USA
E-mail: wevans@uci.edu

^b Department of Chemistry and Biochemistry, University of California-San Diego, La Jolla, California 92093, USA

Abstract

Cp′₂Ln(THF)₂ metallocenes (Cp′ = C₅H₄SiMe₃) react with 2.2.2-cryptand (crypt) to form Ln²⁺-in-crypt complexes, [Ln(crypt)(THF)][Cp′₃Ln]₂ (Ln = Sm, Eu) and [Yb(crypt)][Cp'₃Yb]₂, that contain Ln²⁺ ions surrounded only by neutral ligands. A bimetallic, mixed-ligand metallocene/opened-crypt complex of Sm²⁺, [Sm(C₁₆H₃₂N₂O₆-κ²O:κ²O′)SmCp′′₂], was obtained by KC₈ reduction of Cp′′₂Sm(THF) [Cp′′ = C₅H₃(SiMe₃)₂] in the presence of crypt.

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Article information

DOI: https://doi.org/10.1039/C7CC04396A
Article type: Communication
Submitted: 06 Jun 2017
Accepted: 06 Jul 2017
First published: 12 Jul 2017

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Chem. Commun., 2017,53, 8664-8666

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Synthesis of rare-earth-metal-in-cryptand dications, [Ln(2.2.2-cryptand)]²⁺, from Sm²⁺, Eu²⁺, and Yb²⁺ silyl metallocenes (C₅H₄SiMe₃)₂Ln(THF)₂

D. N. Huh, C. M. Kotyk, M. Gembicky, A. L. Rheingold, J. W. Ziller and W. J. Evans, Chem. Commun., 2017, 53, 8664 DOI: 10.1039/C7CC04396A

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