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Updated: Sep 19, 2025
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Published on: April 10, 2015
Synthesis, Structure, and Property of Tris(biphenyldiyl)yttrium(III) Tris(binaphthyldiyl)yttrium(III) and
Masaki Hara1, Gabriela Handzlik2, Mirosław Arczyński2
1Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
Abstract:
In the recent development of homoleptic σ-hydrocarbyl rare-earth metal complexes focusing on reactivity and catalytic activity, rare-earth metal complexes with a variety of alkyl ligands have been synthesized, and the principle for designing thermally stable σ-hydrocarbyl rare-earth metal complexes has been established. Nevertheless, there has been no report of homoleptic rare-earth metal complexes comprising only identical bidentate σ-hydrocarbyl ligands. Herein, we present homoleptic σ-hydrocarbyl rare-earth metal complexes possessing bidentate biaryldiyl ligands, tris(biphenyl-2,2'-diyl)yttrium(III) complex 1, tris(1,1'-binaphthyl-2,2'-diyl)yttrium(III) complex 2, and tris(1,1'-binaphthyl-2,2'-diyl)erbium(III) complex 3. Single-crystal X-ray crystallography revealed the trigonal prismatic geometry of 1, along with the trigonal antiprismatic geometry of 2 and 3, each constructed through three-centered two-electron bonds among the rare-earth metal, ipso-carbon, and lithium. The static and dynamic magnetic properties of 3 were investigated in the solid state, showing a slow magnetic relaxation typical of single-molecule magnets. The fitting of the magnetic behavior of 3 and the ab initio theoretical calculations indicated that the magnetic relaxation of 3 occurs primarily through a Raman relaxation process.
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