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Pentanuclear heterobimetallic 3d-4f complexes of Ln2M3-type — structure and magnetism

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Abstract

From a series of pentanuclear, heterobimetallic complexes of the general composition [{Ln(H2O)n}2{Ni(dto)2}3] · xH2O, four complexes (Ln = Gd(III) with n = 4; Ln = Dy(III), Ho(III), or Er(III), with n = 5; x = 9–12; dto = 1,2-dithiooxalate) were studied due to their large magnetic moments (up to 14.65 B.M.). The magnetic properties of these complete series were measured at room temperature and the temperature dependent magnetic properties of the complexes Gd2Ni3, Dy2Ni3, Ho2Ni3, and Er2Ni3 were studied at room temperature down to 1.8 K. Whereas the intramolecular metal-metal distances were rather long (Ni1-Ni2: 11.0–11.5 Å; Ln-Ni: 6.0–6.3 Å), relatively short intermolecular metal-metal distances (Ni1-Ni2′: 3.5 Å; Er-Er′: 6.0 Å) were found in the crystal lattice, giving rise to weak intermolecular metal-metal interactions. These weak spin interactions were also supported by the EPR spectrum of a powdered sample of the diamagnetically undiluted Gd2Ni3 complex.

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Authors and Affiliations

  1. Institute of Chemistry, University of Potsdam, Karl-Liebknecht-Str. 24-25, D 14476, Golm, Germany

    Matthias Siebold, Uwe Schilde & Peter Strauch

  2. Faculty of Chemistry, University of Wroclaw, 14 F. Joliot-Curie, PL 50 383, Wroclaw, Poland

    Maria Korabik & Jerzy Mrozinski

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  1. Matthias Siebold
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  2. Maria Korabik
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  3. Uwe Schilde
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  4. Jerzy Mrozinski
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  5. Peter Strauch
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Correspondence to Peter Strauch.

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Dedicated to Professor Milan Melník on the occasion of his 70th birthday

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Siebold, M., Korabik, M., Schilde, U. et al. Pentanuclear heterobimetallic 3d-4f complexes of Ln2M3-type — structure and magnetism. Chem. Pap. 62, 487–495 (2008). https://doi.org/10.2478/s11696-008-0060-9

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