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Issue 62, 2017
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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

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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(C16H32N2O62O:κ2O′)SmCp′′2], was obtained by KC8 reduction of Cp′′2Sm(THF) [Cp′′ = C5H3(SiMe3)2] in the presence of crypt.

Graphical abstract: 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

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Publication details

The article was received on 06 Jun 2017, accepted on 06 Jul 2017 and first published on 12 Jul 2017


Article type: Communication
DOI: 10.1039/C7CC04396A
Citation: 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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