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Three trinuclear Mn2Mo molecules based on the orbitally degenerate Mo(CN)7(4-) anion were prepared, one of which is the first single-molecule magnet (SMM) based on heptacyanomolybdate. The blocking temperature and the energy barrier (U = 40.5 cm(-1)) are records for a cyanide-based SMM. Wide hysteresis loops and sharp quantum tunneling steps were observed from single-crystal measurements.
Qian et al. (Thu,) studied this question.