Initial Example of a Triangular Single-Molecule Magnet from Ligand-Induced Structural Distortion of a [MnIII3O]7+ Complex
Journal of the American Chemical Society2005Vol. 127(44), pp. 15380–15381
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Theocharis C. Stamatatos, Dolos Foguet‐Albiol, Constantinos C. Stoumpos, Catherine P. Raptopoulou, Aris Terzis, Wolfgang Wernsdorfer, Spyros P. Perlepes, George Christou
Abstract
The reaction of [Mn3O(O2CR)6(py)3](ClO4) (R = Me, Et) with methyl 2-pyridyl ketone oxime (mpkoH) in a 1:3 molar ratio in MeOH/MeCN leads to [Mn3O(O2CR)3(mpko)3](ClO4) in 80-90% isolated yield. Ferromagnetic exchange interactions between the three MnIII ions in the nonplanar [MnIII3O]7+ triangular core lead to a spin ground state of S = 6; single-crystal studies reveal the temperature and sweep rate dependent hysteresis loops expected for a single-molecule magnet.
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