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Slow relaxation of the magnetization reveals the single-molecule magnetic behavior of Mn2(saltmen)2(ReO4)2 (saltmen2−=N,N′-(1,1,2,2-tetramethylethylene)bis(salicylideneiminate), a simple, out-of-plane MnIII dimeric complex containing a MnIII(μ-O)2MnIII core (see structure shown, Mn brown, O red, N blue, Re pink). The two anisotropic MnIII ions are ferromagnetically coupled, which induces an ST=4 ground state.
Miyasaka et al. (Wed,) studied this question.