Inverse-Sandwich Rare Earth Metal Complexes Comprising a Planar Toluene Dianion.

ABSTRACT: We report the first inverse-sandwich complexes containing rare earth (RE^III) metal ions that captured a toluene dianion between them. Toluene-bridged complexes [{(Me₃Si)₂NC(NⁱPr)₂}₂RE]₂(μ-η⁶:η⁶-C₆H₅Me) (RE = Y (1), Dy (2), and Er (3)) were synthesized via chemical reductions of chloride-bridged RE complexes in which each tripositive metal is stabilized by two guanidinate ligands. Compounds 1-3 were unambiguously characterized by crystallography, NMR, UV-vis, and IR spectroscopy, magnetometry, and computations. The bond metrics from single-crystal X-ray diffraction analysis revealed a planar, cyclohexadienediide-like structure for the ligated a

SUBMITTER: Pugliese ER 

PROVIDER: S-EPMC12820926 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature