Abstract
The oxydiacetate-bridged copper(II) complex [Cu(oda)(1,10-phen)] · 3H 2O (oda = oxydiacetate dianion, 1,10-phen = 1,10-phenanthroline) has been characterized. The complex is dinuclear and centrosymmetric with each copper atom residing in a CuN 2O 4 octahedral environment. The Cu(II) ions are bridged by two carboxylate-oxygen atoms in a strictly planar Cu 2O 2 core with a Cu–Cu distance of 3.417(2) Å. The magnetic susceptibility measurements (2–300 K) show weak ferromagnetic coupling between the copper ions with J = 3.3 cm −1. The results are compared with those of the homologous [Cu(tda)(1,10-phen)] 2tda (tda = thiodiacetate dianion). A model proposed for the electronic structures of the complexes based on the density functional theory (DFT) satisfactorily accounts for the magnetic results.
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