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Hydrogen Bonding Influenced Coordination Mode of Azide Ligand in Schiff base Copper(II) Complexes: Synthesis, Crystal Structures, and Antibacterial Activity

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Abstract

Two copper(II) complexes, [CuL1N3] (I) and [CuL2(μ1, 1-N3)] (II), where L1 = 2-[(2-diethylaminoethylimino)methyl]-4,6-difluorophenolate, L2 = 2,4-difluoro-6-[(2-isopropylaminoethylimino)-methyl]phenolate, have been prepared and structurally characterized by elemental analyses, IR and UV-Vis spectra, as well as single crystal X-ray determination (CIF files CCDC nos. 1848289 (I) and 1848290 (II)). In complex I, the Cu atom is in square planar coordination, with the azide ligand in terminal coordination mode. In complex II, the Cu atom is in square pyramidal coordination, with the azide ligand in end-on bridging mode. The crystals are stabilized by hydrogen bonds, which influence the coordination mode of the azide ligand. The complexes have strong antibacterial activity against B. subtilis and S. aureus.

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ACKNOWLEDGMENTS

This work was supported by Zhengzhou University of Light Industry.

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Authors and Affiliations

  1. Key Laboratory of Surface and Interface Science of Henan Province, School of Material and Chemical Engineering, Zhengzhou University of Light Industry, 450001, Zhengzhou, P.R. China

    D. L. Peng

  2. Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, Zhengzhou University of Light Industry, 450001, Zhengzhou, P.R. China

    D. L. Peng

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  1. D. L. Peng
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Correspondence to D. L. Peng.

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Peng, D.L. Hydrogen Bonding Influenced Coordination Mode of Azide Ligand in Schiff base Copper(II) Complexes: Synthesis, Crystal Structures, and Antibacterial Activity. Russ J Coord Chem 45, 734–740 (2019). https://doi.org/10.1134/S107032841910004X

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  • DOI: https://doi.org/10.1134/S107032841910004X

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