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A mononuclear Er(III) sandwich type complex, Li(DME)3Er(III)(COT")2, was isolated using 1,4-bis(trimethylsilyl)cyclooctatetraenyl dianion (COT"). Remarkably, this low-symmetry complex exhibits magnet-like behavior of magnetic remanence and coercivity in the hysteresis loops up to 8 K with an energy barrier (Ueff) of 187(1) K, thus making this molecule a unique single-ion magnet.
Roy et al. (Tue,) studied this question.
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