The orthogonal arrangement of the magnetic orbitals of the nitroxide ligands in 1 is the basis of the magnetic behavior of this complex. Temperature-dependent measurements of the magnetic susceptibility show that χmT gradually increases with decreasing temperature and reaches a plateau (0.96 emu mol−1) at 40 K; however, at temperatures below 20 K there is a sudden decrease. This behavior can be interpreted as a ferromagnetic interaction between the nitroxide ligands.
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Oshio et al. (1994) studied this question.
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