A combination of azido and dipyridylketone (dpk) ligands led to the isolation of the tetranuclear Ni(II) complex 1 (dpkOH and dpkOCH(3) result from solvolysis of dpk). The complex exhibits ferromagnetic behavior, and its structure can be described as a dicubane unit with two missing vertices (see picture).
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Serna et al. (2000) studied this question.
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