Exchange interaction via an ether bridge between magnetic moieties in organic high-spin molecules has been studied by single-crystal ESR. Whether it is ferromagnetic or antiferromagnetic depends on the substituted position of the bridge, showing the important role of topology in spin alignment. This behavior is satisfactorily interpreted as due to superexchange mechanism. Using the antiferromagnetic bridge, a model compound for a unit of organic ferrimagnets is designed and its spin structure is determined.
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Itoh et al. (1989) studied this question.
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