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

Durrant, James P.; Tang, Jinkui; Mansikkamäki, Akseli; Layfield, Richard A. (2020-03-19)
 
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https://doi.org/10.1039/D0CC01722A

Durrant, James P.
Tang, Jinkui
Mansikkamäki, Akseli
Layfield, Richard A.
Royal Society of Chemistry
19.03.2020

Durrant, J., Tang, J., Mansikkamäki, A., Layfield, R. (2020) Enhanced single-molecule magnetism in dysprosium complexes of a pristine cyclobutadienyl ligand. Chemical Communications, 56 (34), 4708-4711. doi:10.1039/D0CC01722A

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doi:https://doi.org/10.1039/D0CC01722A
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Abstract

Intact transfer of the cyclobutadienyl ligand [C₄(SiMe₃)₄]2− to yttrium and dysprosium (M) produces the half-sandwich complexes [M{η⁴-C₄(SiMe₃)₄}(BH₄)₂(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−1, 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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