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Synthesis, spectral and ferromagnetic interactions in isophthalato bridged binuclear copper(II) complexes

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Summary

Four novel copper(II) binuclear complexes have been synthesized and characterized, namely [Cu2(IPHTA)( L)2](ClO4)2 (L denotes 2,2′-bipyridine (bpy); 1,10- phenanthroline (phen); 4,4′-dimethyl-2,2′-bipyridine (Me2bpy) and 5-nitro-1,10-phenanthroline (NO2-phen); where IPHTA is the isophthalate dianion. Based on the elemental analyses, molar conductance measurements and spectroscopic studies, extended IPHTA-bridged structures consisting of two copper(II) ions, each in a square planar environment, are proposed for these complexes. The [Cu2(IPHTA)(bpy)2](ClO4)2 (1) and [Cu2(IPHTA)(phen)2](ClO4)2 (2) complexes were characterized by variable temperature magnetic susceptibility measurements (4–300 K) and the observed data were successfully simulated by the equation based on the spin Hamiltonian operator, Ĥ = −2JŜ1Ŝ2, giving the exchange integral J = 8.96 cm−1 for (1) and J = 9.88 cm−1 for (2). This result indicates the presence of a weak ferromagnetic spin-exchange interaction between the metal ions.

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Authors and Affiliations

  1. Department of Chemistry, Qufu Normal University, 273165, Qufu Shandong, P.R. China

    Yan-Tuan Li & Cui-Wei Yan

  2. Department of Chemistry, Nankai University, Tianjin, P.R. China

    Dai-Zheng Liao

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  1. Yan-Tuan Li
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  2. Cui-Wei Yan
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  3. Dai-Zheng Liao
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Li, YT., Yan, CW. & Liao, DZ. Synthesis, spectral and ferromagnetic interactions in isophthalato bridged binuclear copper(II) complexes. Transition Metal Chemistry 22, 234–237 (1997). https://doi.org/10.1007/BF03651764

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  • DOI: https://doi.org/10.1007/BF03651764

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