Syntheses and Reactivity of Yb and Sm Inverse Sandwich Arene Complexes
Thakur SK, Langer J, Harder S (2025)
Publication Type: Journal article
Publication year: 2025
Journal
DOI: 10.1002/chem.202502710
Abstract
Inverse sandwich arene complexes of rare earth metals have gained notable interest due to their unique electronic properties. In these complexes, an arene ligand bridges two metal centres, storing 0, 2, or 4 electrons, which is the basis for unique reactivity. Herein, we report on the reactivity of [(DIPePBDI)Ln]2(η6,η6-benzene) (II-Ln, Ln = Yb or Sm) and in situ reduced [(DIPePBDI)SmI]2 (V) (DIPePBDI = HC[C(Me)N-DIPeP]2, DIPeP = 2,6-CHEt2-phenyl). The YbII-benzene2−-YbII complex (II-Yb) reacted smoothly with biphenyl, naphthalene, anthracene, and COT, giving a range of new YbII complexes with bridging arene or COT ligands. However, due to much stronger Sm-arene bonding in II-Sm, which should be regarded as a SmIII-benzene4−-SmIII complex, this reagent only reacted with substrates that can be reduced easily (anthracene and COT). Interestingly, reaction with anthracene gave a SmII-anthracene2−-SmII complex, showing that the benzene4− is able to reduce SmIII to SmII. In situ reduced [(DIPePBDI)SmI]2 (V) can be considered a (DIPePBDI)SmI synthon, which reacted smoothly with toluene, biphenyl, or 1,3,5-triphenyl-benzene and affords a series of SmIII-arene4−-SmIII complexes. However, reaction with pyrene gave an SmII-pyrene2−-SmII product. All complexes have been fully characterized with X-ray diffraction.
Authors with CRIS profile
How to cite
APA:
Thakur, S.K., Langer, J., & Harder, S. (2025). Syntheses and Reactivity of Yb and Sm Inverse Sandwich Arene Complexes. Chemistry - A European Journal. https://doi.org/10.1002/chem.202502710
MLA:
Thakur, Sandeep Kumar, Jens Langer, and Sjoerd Harder. "Syntheses and Reactivity of Yb and Sm Inverse Sandwich Arene Complexes." Chemistry - A European Journal (2025).
BibTeX: Download
