Size‐Controlled Hapticity Switching in [Ln(C9H9)(C8H8)] Sandwiches

Maxime Tricoire (1) , Luca Münzfeld (2) , Jules Moutet (1) , Nolwenn Mahieu (1) , Léo La Droitte (3) , Eufemio Moreno‐pineda (1) , Frédéric Gendron (3) , Jeremy D Hilgar (4) , Jeffrey D Rinehart (4) , Mario Ruben (2) , Boris Le Guennic (3) , Olivier Cador (3) , Peter W Roesky (2) , Grégory Nocton (1)

1 LCM - Laboratoire de chimie moléculaire
2 KIT - Karlsruher Institut für Technologie
3 ISCR - Institut des Sciences Chimiques de Rennes
4 UC San Diego - University of California [San Diego]

Sandwich complexes of lanthanides have recently attracted a considerable amount of interest due to their applications as Single Molecule Magnet (SMM). Herein, a comprehensive series of heteroleptic lanthanide sandwich complexes ligated by the cyclononatetraenyl (Cnt) and the cyclooctatetraenyl (Cot) ligand [Ln(Cot)(Cnt)] (Ln=Tb, Dy, Er, Ho, Yb, and Lu) is reported. The coordination behavior of the Cnt ligand has been investigated along the series and shows different coordination patterns in the solid-state depending on the size of the corresponding lanthanide ion without altering its overall anisotropy. Besides the characterization in the solid state by single-crystal X-ray diffraction and in solution by 1 H NMR, static magnetic studies and ab initio computational studies were performed.

Mots clés: cyclononatetraenyl; lanthanides; magnetism; organometallics; single molecule magnets

Domaines: Chimie de coordination

Maxime Tricoire, Luca Münzfeld, Jules Moutet, Nolwenn Mahieu, Léo La Droitte, et al.. Size‐Controlled Hapticity Switching in [Ln(C9H9)(C8H8)] Sandwiches. Chemistry - A European Journal, 2021, 27 (54), pp.13558 - 13567. ⟨10.1002/chem.202101599⟩. ⟨hal-03380768⟩