Lanthanide Triangles Supported by Radical Bridging Ligands

The first examples of metalla­cycles containing rare earth ions bridged by radicals are reported. The molecular triangles [Ln3­(hfac)6­(bptz•–)3] (Ln = DyIII, YIII; hfac = 1,1,1,5,5,5-hexa­fluoro-2,4-pentane­dionate; bptz = 3,6-bis­(2-pyridyl)-1,2,4,5-tetrazine) consist of lanthanide ions bridged by...

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Bibliographic Details
Published in:Journal of the American Chemical Society 2018-01, Vol.140 (3), p.908-911
Main Authors: Dolinar, Brian S, Alexandropoulos, Dimitris I, Vignesh, Kuduva R, James, Tia’Asia, Dunbar, Kim R
Format: Article
Language:English
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Summary:The first examples of metalla­cycles containing rare earth ions bridged by radicals are reported. The molecular triangles [Ln3­(hfac)6­(bptz•–)3] (Ln = DyIII, YIII; hfac = 1,1,1,5,5,5-hexa­fluoro-2,4-pentane­dionate; bptz = 3,6-bis­(2-pyridyl)-1,2,4,5-tetrazine) consist of lanthanide ions bridged by bptz radical anion (bptz•–) ligands. Magnetic susceptibility measurements and CASSCF calculations performed on [Dy3(hfac)6(bptz•–)3] reveal the presence of anti­ferro­magnetic coupling between the DyIII centers and the bptz•– ligands, with J = −6.62 cm–1.
ISSN:0002-7863
1520-5126
DOI:10.1021/jacs.7b12495