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Enhanced single-molecule magnetism in dysprosium complexes of a pristine cyclobutadienyl ligand

Chemical Communications, ISSN: 1364-548X, Vol: 56, Issue: 34, Page: 4708-4711
2020
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Article Description

Intact transfer of the cyclobutadienyl ligand [C(SiMe)] to yttrium and dysprosium (M) produces the half-sandwich complexes [M{η-C(SiMe)}(BH)(THF)] as coordination polymers with bridging sodium or potassium ions. The dysprosium versions are single-molecule magnets (SMMs) with energy barriers of 371(7) and 357(4) cm, respectively. The pristine cyclobutadienyl ligands provide a strong axial crystal field that enhances the SMM properties relative to related cyclopentadienyl compounds.

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