Three new mononuclear tri-spin lanthanide-nitronyl nitroxide radical compounds: syntheses, structures and magnetic properties

Dalton Transactions : an International Journal of Inorganic Chemistry
Lei-Lei LiPeng Cheng

Abstract

Based on the nitronyl nitroxide radical, 2-(4-(methoxycarbonyl)phenyl)-4,4,5,5-tetramethylimidazolin-1-oxyl-3-oxide (1, NITPhCOOMe), and three mononuclear tri-spin compounds [Ln(hfac)3(NITPhCOOMe)2] (Ln = Gd (2), Tb (3), Dy (4); hfac = hexafluoroacetylacetonate) are successfully synthesized and fully characterized. Compounds 2 and 4 are isostructural and crystallize in the C2/c space group, while compound 3 crystallizes in the P2₁/c space group. For compounds 2-4, the central metal ions are all eight-coordinate in distorted triangular dodecahedral LnO8 coordination geometry (D(2d) symmetry) completed by three bischelate hfac(-) ligands and two monodentate radicals. Magnetic studies show that radical 1 undertakes the transition from the paramagnetic state to 3D antiferromagnetic ordering at 4.2 K. In addition, compound 3 exhibits field-induced single-molecule magnet (SMM) behavior.

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Citations

Jan 27, 2016·Dalton Transactions : an International Journal of Inorganic Chemistry·Apoorva UpadhyayMaheswaran Shanmugam
Jul 28, 2017·Dalton Transactions : an International Journal of Inorganic Chemistry·Jian WangXin-Yi Wang
Sep 12, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Kang WangLicun Li
Jan 11, 2017·Angewandte Chemie·Jan WinsbergUlrich S Schubert
Aug 12, 2021·Dalton Transactions : an International Journal of Inorganic Chemistry·Xiaohui HuangJean-Pascal Sutter

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