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  4. Multielectron Redox Chemistry of Ytterbium Complexes Reaching the +1 and Zero Formal Oxidation States
 
research article

Multielectron Redox Chemistry of Ytterbium Complexes Reaching the +1 and Zero Formal Oxidation States

Tricoire, Maxime  
•
Sroka, Weronika  
•
Rajeshkumar, Thayalan
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2024
Journal of the American Chemical Society

Lanthanide redox reactivity remains limited to one-electron transfer reactions due to their inability to access a broad range of oxidation states. Here, we show that multielectron reductive chemistry is achieved for ytterbium by using the tripodal tris(siloxide)arene redox-active ligand, which can store two electrons in the arene anchor. Reduction of the Yb(III) complex of the tris(siloxide)arene tripodal ligand affords the Yb(II) analogue by metal-centered reduction. Two subsequent reduction events occur mainly at the ligand with retention of the ligand framework and formation of analogous complexes of Yb in the formal +1 and zero oxidation states. Four complexes of Yb in four different oxidation states were isolated, crystallographically and spectroscopically characterized, and their electronic structure was confirmed by DFT studies. Reactivity studies show that the “Yb(I)” complex can transfer two electrons to organic azides, with retention of its molecular structure, to form highly reactive imido intermediates, providing a rare example of a two-electron transfer at a single lanthanide center that does not involve accessing the +4 oxidation state.

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Type
research article
DOI
10.1021/jacs.4c14904
Scopus ID

2-s2.0-85212317727

PubMed ID

39680610

Author(s)
Tricoire, Maxime  

École Polytechnique Fédérale de Lausanne

Sroka, Weronika  

École Polytechnique Fédérale de Lausanne

Rajeshkumar, Thayalan

INSA Toulouse

Scopelliti, Rosario  

École Polytechnique Fédérale de Lausanne

Sienkiewicz, Andrzej  

École Polytechnique Fédérale de Lausanne

Maron, Laurent

INSA Toulouse

Mazzanti, Marinella  

École Polytechnique Fédérale de Lausanne

Date Issued

2024

Published in
Journal of the American Chemical Society
Volume

147

Issue

1

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
SCI-SB-MM  
ISIC-XRDSAP  
LQM  
FunderFunding(s)Grant NumberGrant URL

École Polytechnique Fédérale de Lausanne

Swiss National Science Foundation

212723,231638

Available on Infoscience
January 25, 2025
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/244293
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