Demonstrates magnetic properties of high-spin Co complexes, highlighting critical interpretation methods.
Two new polynuclear high-spin CoII coordination clusters have been synthesised using the proligand N-allyldiethanolamine (2,2′-(allylazanediyl)bis(ethan-1-ol), adeaH₂ ). The heptanuclear coordination cluster [CoIII₂CoII₅ (adea)₂(μ₃ -OH)₂ (μ₃ -OMe)₂ (μ₂ OMe)₂ (piv)₆(MeOH)₂]⋅2MeOH (1) possesses a disk-like core motif and was used as a starting material for the syntheses of the octanuclear coordination cluster [CoIII₂ CoII₆(adea)₂(μ₃-OH)₄(piv)₁₀]⋅2Hpiv⋅2MeCN (2). From magnetic measurements a magnetic model could be developed which fits the χT versus T and M versus B curves accurately. In order to rationalise the magnetic properties of 2 it was found essential to consider the consequences of the freedom to choose the local coordinate frames used for describing the individual CoII centres in the cluster. The far-reaching implications of this for the interpretation of magnetic parameters derived from magnetic modelling of clusters containing highly-anisotropic metal ions are discussed.
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Nehrkorn et al. (2026) studied this question.
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