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Triangular Nickel Complexes Derived from 2-Pyridylcyanoxime: An Approach to the Magnetic Properties of the [Ni33-OH){pyC(R)NO}3]2+ Core

Authors

  • Jordi Esteban,

    1. Departament de Química Inorgànica, Universitat de Barcelona, Av. Diagonal 645, 08028 Barcelona (Spain), Fax: (+34) 934907725
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  • Prof. Eliseo Ruiz,

    1. Departament de Química Inorgànica and Institut de Química Teòrica i Computacional, Universitat de Barcelona, Av. Diagonal 645, 08028 Barcelona (Spain)
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  • Dr. Mercé Font-Bardia,

    1. Departament de Cristallografia, Mineralogia i Diposits, Universitat de Barcelona, Martí I Franqués s/n, 08028 Barcelona (Spain)
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  • Dr. Teresa Calvet,

    1. Departament de Cristallografia, Mineralogia i Diposits, Universitat de Barcelona, Martí I Franqués s/n, 08028 Barcelona (Spain)
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  • Prof. Albert Escuer

    Corresponding author
    1. Departament de Química Inorgànica, Universitat de Barcelona, Av. Diagonal 645, 08028 Barcelona (Spain), Fax: (+34) 934907725
    • Departament de Química Inorgànica, Universitat de Barcelona, Av. Diagonal 645, 08028 Barcelona (Spain), Fax: (+34) 934907725
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Abstract

A series of nickel complexes with nuclearity ranging from Ni3 to Ni6 have been obtained by treatment of a variety of nickel salts with the 2-pyridylcyanoxime ligand. The reported compounds have as a common structural feature the triangular arrangement of nickel cations bridged by a central μ3-oxo/alkoxo ligand. These compounds are simultaneously the first nickel derivatives of the 2-pyridylcyanoxime ligand and the first examples of isolated, μ3-O triangular pyridyloximate nickel complexes. Magnetic measurements reveal antiferromagnetic interactions promoted by the μ3-O and oximato superexchange pathways and comparison of the experimental structural and magnetic data with DFT calculations give an in-depth explanation of the factors that determine the magnetic interaction in this kind of system.

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