Abstract
Four Cu(II) complexes [CuLH2O](ClO4)2, 1; [CuLCl]Cl.H2O, 2; [CuLBr]2(Cu3Br5), 3; and [CuLH2O](NO3)2, 4; where L = tetradentate semicarbazone ligand, have been synthesized and characterized by elemental analysis, FT-IR and UV–Vis. The structures of compounds 1 and 3 have been determined by single-crystal X-ray diffraction analyses. In mononuclear 1, the semicarbazone, L acts as a tetradentate neutral ligand and a water molecule also coordinates to the Cu atom. There are two independent [CuL(H2O)]2+ cations and four perchlorate anions in the crystallographic asymmetric unit. One of the cations has a weak interaction between its Cu atom and a O atom of an adjacent perchlorate anion. The structure of 3 contains two independent [CuLBr]+ cations and a (Cu3Br5)2− anion. The coordination geometry around the cation’s Cu(II) ion is five-coordinated square pyramidal, with L acting as a tetradentate neutral ligand and with a Br at the apical position. The Cu3Br 2−5 anions link to one another to form an infinite one-dimensional (Cu3Br 2−5 )n chain. Furthermore, the Hirshfeld surface analyses and the 2D fingerprint plot have been discussed.
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The authors are grateful to the Yazd University and the Australian National University for partial support of this work.
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Vafazadeh, R., Ehsani, M. & Willis, A.C. Synthesis and structural characterization of copper(II) complexes with a tetradentate semicarbazone ligand derived from 2,5-hexadione. J IRAN CHEM SOC 16, 2509–2518 (2019). https://doi.org/10.1007/s13738-019-01721-3
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DOI: https://doi.org/10.1007/s13738-019-01721-3