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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Enhanced single-molecule magnetism in dysprosium complexes of a pristine cyclobutadienyl ligand.
Chem Commun (Camb)
April 2020
Department of Chemistry, School of Life Sciences, University of Sussex, Brighton, BN1 9QR, UK.
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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