A Dimeric Copper(II) Complex of Oxalate and Oxamide Dioxime Ligands: Synthesis, Crystal Structure, Thermal Stability, and Magnetic Properties - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Zeitschrift fur Naturforschung B Année : 2014

A Dimeric Copper(II) Complex of Oxalate and Oxamide Dioxime Ligands: Synthesis, Crystal Structure, Thermal Stability, and Magnetic Properties

Résumé

The dimeric copper(II) complex [Cu(C2O4)(H2oxado)(H2O)]2 (1), where H2oxado = oxamide dioxime, has been synthesized in water and characterized by elemental and thermal analyses, IR spectroscopy, and single-crystal X-ray diffraction. Complex 1 is composed of two neutral [Cu(C2O4)(H2oxado)(H2O)] entities connected by Cu–O bonds between oxalate oxygen atoms and copper(II) ions, thereby producing a centrosymmetric dimer, with the Cu(II) centers exhibiting a strongly distorted octahedral coordination. Neighboring dimers are hydrogen-bonded through O–H⋯O interactions leading overall to a layer structure. Thermal analyses of complex 1 showed two significant weight losses corresponding to the coordinated water molecules, followed by the decomposition of the network. Variable-temperature (10–300K) magnetic susceptibility measurements revealed very weak antiferromagnetic interactions (θ =−0.86  K from Curie–Weiss law behavior) within the dinuclear unit.
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hal-02903644 , version 1 (21-07-2020)

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Justin Nenwa, Patrick Djonwouo, Emmanuel Nfor, Michel Bélombé, Erwann Jeanneau, et al.. A Dimeric Copper(II) Complex of Oxalate and Oxamide Dioxime Ligands: Synthesis, Crystal Structure, Thermal Stability, and Magnetic Properties. Zeitschrift fur Naturforschung B, 2014, 69b (3), pp.321-326. ⟨10.5560/ZNB.2014-3309⟩. ⟨hal-02903644⟩
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