Intermediate Valence States in Lanthanide Compounds. Issue 23 (25th February 2021)

• Record Type: Journal Article
• Authors: Tricoire, Maxime; Mahieu, Nolwenn; Simler, Thomas; Nocton, Grégory
• Is Part Of: Chemistry. Volume 27:Issue 23(2021)
• Page Start: 6860
• Page End: 6879
• Publication Date: 2021-02-25
• Subjects: intermediate valence -- lanthanides -- organometallics -- spectroscopy -- theoretical computations; Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.202004735
• Languages: English
• ISSNs: 0947-6539

Abstract

Abstract: Over more than 50 years, intermediate valence states in lanthanide compounds have often resulted in unexpected or puzzling spectroscopic and magnetic properties. Such experimental singularities could not be rationalised until new theoretical models involving multiconfigurational electronic ground states were established. In this minireview, the different singularities that have been observed among lanthanide complexes are highlighted, the models used to rationalise them are detailed and how such electronic effects may be adjusted depending on energy and symmetry considerations is considered. Understanding and tuning the ground‐state multiconfigurational behaviour in lanthanide complexes may open new doors to modular and unusual reactivities. Abstract : Intermediate valence states : This review summarizes the spectroscopic and magnetic singularities gathered over more than 50 years and pointing to intermediate valence states in lanthanide compounds. This substantial body of evidence, supported by advanced computational studies, bolsters ground‐state multiconfigurational behaviour. Understanding and tuning these effects through symmetry and energy considerations paves the way to novel and unusual reactivities.