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
Joseph W.
Ziller
a
and
William J.
Evans
*a
a
Christopher M.
Kotyk,
a
Milan
Gembicky,
b
Joseph W.
Ziller
a
and
William J.
Evans
*a
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.
![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](/en/Image/Get?imageInfo.ImageType=GA&imageInfo.ImageIdentifier.ManuscriptID=C7CC04396A&imageInfo.ImageIdentifier.Year=2017)
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