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Updated: May 30, 2025

Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of ChalcogenidoplumbatesII or IV
Published on: December 29, 2016
Multimetallic Half-Sandwich Complexes of the Rare-Earth Metals
Dennis A Buschmann1, H Martin Dietrich1, James Durrant2
1Institut Für Anorganische Chemie, Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany.
Abstract:
Multimetallic half-sandwich complexes of the paramagnetic lanthanides gadolinium, terbium, dysprosium, holmium, and erbium as well as of diamagnetic yttrium are readily accessible via AlMe4/halogenido exchange reactions of Cp*Ln(AlMe4)2 with the mild halogenido transfer reagents Me3SiI and Me3GeX (Cp* = C5Me5; X = Br, Cl). Depending on the rare-earth-metal center and halogenido ion size, complexes with distinct structural motifs and nuclearities are obtained, including dimeric compounds [Cp*Ln(AlMe4)(μ2-Cl)]2 for the smaller metal centers Ln = Ho, Er, iodido-bridged tetranuclear rings [Cp*Ln(μ2-I)2]4 (Ln = Y, Tb, Dy, Ho, Er), and a heterobimetallic tetramethylaluminato-bridged gadolinium cluster [Cp*4Gd4I7(AlMe4)]2. The tetranuclear dysprosium complex [Cp*Dy(μ2-I)2]4 shows single-molecule magnet (SMM) behavior in zero applied field with an effective energy barrier of 164(10) cm-1.
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