Year: 2025
Type: article
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 [( DIPeP BDI)Ln] 2 ( η 6 , η 6 ‐benzene) ( II ‐Ln, Ln = Yb or Sm) and in situ reduced [( DIPeP BDI)SmI] 2 ( V ) ( DIPeP BDI = HC[C(Me)N‐DIPeP] 2 , DIPeP = 2,6‐CHEt 2 ‐phenyl). The Yb II ‐benzene 2− ‐Yb II complex ( II ‐Yb) reacted smoothly with biphenyl, naphthalene, anthracene, and COT, giving a range of new Yb II complexes with bridging arene or COT ligands. However, due to much stronger Sm‐arene bonding in II ‐Sm, which should be regarded as a Sm III ‐benzene 4− ‐Sm III complex, this reagent only reacted with substrates that can be reduced easily (anthracene and COT). Interestingly, reaction with anthracene gave a Sm II ‐anthracene 2− ‐Sm II complex, showing that the benzene 4− is able to reduce Sm III to Sm II . In situ reduced [( DIPeP BDI)SmI] 2 ( V ) can be considered a ( DIPeP BDI)Sm I synthon, which reacted smoothly with toluene, biphenyl, or 1,3,5‐triphenyl‐benzene and affords a series of Sm III ‐arene 4− ‐Sm III complexes. However, reaction with pyrene gave an Sm II ‐pyrene 2− ‐Sm II product. All complexes have been fully characterized with X‐ray diffraction.
Source: Chemistry - A European Journal
Institution: Friedrich-Alexander-Universität Erlangen-Nürnberg
Language: English
Subfield: Organic Chemistry
Field: Chemistry
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,640
OpenAlex ID: W4414929437