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The remarkable influence of N,O-ligands in the assembly of a bis-calix[4]arene-supported [MnMnMn] cluster.

  • Author(s): Coletta, Marco
  • Sanz, Sergio
  • McCormick, Laura J
  • Teat, Simon J
  • Brechin, Euan K
  • Dalgarno, Scott J
  • et al.
Abstract

Calix[4]arenes are versatile ligands, capable of supporting the formation of a wide variety of polymetallic clusters comprising 3d, 4f or 3d-4f metal ions. Calixarene-based metal ion fragments act as both bridging and structure capping moieties in these systems, and this behaviour is systematically extended upon moving to bis-calix[4]arene, a relatively new ligand in which two calix[4]arenes are tethered at the methylene bridge position. N,O-Ligands greatly influence cluster formation with bis-calix[4]arene, affording a remarkable mixed-valence [MnMnMn] cluster that displays coordination chemistry typical of each ligand type, but also new structure capping behaviour for the latter.

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