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Magnetic anisotropy of a high-spin octanuclear nickel(II) complex with a meso-helicate core
Emilio Pardo1, Isidoro Morales-Osorio, Miguel Julve
1Departament de Química Inorgànica, ICMOL, Universitat de València, 46100 Burjassot, València, Spain.
Abstract:
The octanickel(II) cluster 2b has been synthesized from the novel ferromagnetically coupled dinickel(II) metallacryptand 1b assembled from the m-phenylene-bis(oxamate) ligand. Complex 2b exhibits a dimer-of-tetramers structure, with two oxamate-bridged propeller-shaped tetranuclear units connected through three meta-substituted phenylenediamidate bridges, giving a metallacryptand core of the meso-helicate type. Complex 2b behaves as a ferromagnetically coupled dimer of two S=2 Ni(II)4 units with appreciable magnetic anisotropy.
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