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Synthesis, spectroscopic studies and magnetic properties of binuclear complexes of the first transition series cations bridged by 2,2′-bipyrimidine

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Abstract

Binuclear complexes [M2Cl4(μ-bpym)], where M = VO2+, FeII, CoII or CuII and bpym = 2,2′-bipyrimidine, and [M2(hfacac)4(μ-bpym)] complexes, where hfacac = hexafluoroacetylacetonate and M = FeII, NiII or CoII have been synthesized and characterized by chemical analysis, conductance measurements, i.r., electronic and e.p.r spectroscopies and by magnetic susceptibility measurements (in the 4.2–291 K range). CoII and FeII are in a high spin state. [(VO)2Cl4(μ-bpym)] is paramagnetic, without significant interactions. [Fe2Cl4(μ-bpym)] shows a singular behaviour explained by an antiferromagnetic intradimer exchange and a ferromagnetic interdimer interaction. All other complexes are antiferromagnetic, with an intramolecular exchange parameter, J, varying from −3.3  cm−1 for CoII/math> to −109  cm−1 for CuII.

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Authors and Affiliations

  1. Grupo de Química Inorgánica, Facultad de Ciencias Químicas, Universidad del País Vasco, UPV/EHU, Apartado 1072, 20080-, San Sebastián, Spain

    Montserrat Barquín, María J. González Garmendia & Víctor Bellido

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  1. Montserrat Barquín
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  2. María J. González Garmendia
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  3. Víctor Bellido
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Barquín, M., Garmendia, M.J.G. & Bellido, V. Synthesis, spectroscopic studies and magnetic properties of binuclear complexes of the first transition series cations bridged by 2,2′-bipyrimidine. Transition Metal Chemistry 24, 584–588 (1999). https://doi.org/10.1023/A:1006940930679

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