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Òâ¼û£ºFor the transition-metal compounds, the B3LYP was found to overestimate the stability of the high-spin states.  (M. Reiher, et al. Theor. Chem. Acc. 2001, 107, 48; O. Salomon, et al. J. Chem. Phys. 2002, 117, 4729.)   Thus, in this paper, the B3LYP relative energies between the different spin states are not reliable.

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. Reiher, et al. Theor. Chem. Acc. 2001, 107, 48; O. Salomon, et al. J. Chem. Phys. 2002, 117, 4729.
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