Abstract
The 18-metallacrown-6 metallamacrocycle [Fe6(pmshz)6(C4H9NO)6] has been synthesized by the self-assembly reaction of iron ions with N-substituted salicylhydrazide ligands. Six Fe(III) ions and six deprotonated N-propanoyl-4-methylsalicylhydrazide (H3 pmshz) ligands construct a planar 18-membered ring based on Fe–N–N–Fe linkage. Because of the coordination, the ligand enforces the stereochemistry of the Fe(III) ions as a propeller shape with alternating …ΔΛΔΛ… configurations. There is a strong antiferromagnetic exchange interaction between the paramagnetic iron centers.
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We gratefully acknowledge the Talent Fund of Ningbo Municipal Natural Science Foundation (no. 2008A610051) and K.C. Wong Magna Fund in Ningbo University for financial support of the work.
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Lei, KW., Feng, HM., Wen, JL. et al. Synthesis, structural characterization, and magnetic properties of the metallamacrocycle [Fe6(C11H11N2O3)6(C4H9NO)6]. Monatsh Chem 141, 743–747 (2010). https://doi.org/10.1007/s00706-010-0322-4
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DOI: https://doi.org/10.1007/s00706-010-0322-4