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Synthesis, crystal structure and characterization of new biologically active Cu(II) complexes with ligand derived from N-substituted sulfonamide

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Abstract

A new N-sulfonamide ligand (HL1 = N-(5-(4-methoxyphenyl)-[1,3,4]–thiadiazole–2-yl)-toluenesulfonamide) and two Cu(II) complexes, [Cu(L1)2(py)2] (C1) and [Cu(L2)2(py)2(H2O)] (C2) (HL2 = N-(5-(4-methylphenyl)-[1,3,4]–thiadiazole–2-yl)-benzenesulfonamide) were synthesized. The X-ray crystal structures of the complexes were determined. In the complex C1, the Cu(II) ion is four-coordinated, forming a CuN4 chromophore and in the complex C2, the Cu(II) ion is five-coordinated, forming a CuN4O chromophore. The ligand acts as monodentate, coordinating the Cu(II) ion through a single Nthiadiazole atom. The molecules from the reaction medium (pyridine and water) are also involved in the coordination of the Cu(II) ion. The complexes C1 and C2 are square-planar and a slightly distorted square pyramidal, respectively. The compounds were characterized by FT-IR, electronic, EPR spectroscopic and magnetic methods. The nuclease binding activity studies of the synthesized complexes confirm their capacity to cleave the DNA molecule. The cytotoxicity studies were carried out on melanoma cell line WM35 which confirm that both compounds inhibit the growth of these cells. They have a higher activity compared to a platinum drug, carboplatin.

A new N-sulfonamide ligand (HL1= N-(5-(4-methoxyphenyl)-[1,3,4]–thiadiazole–2-yl)-toluenesulfonamide) and two Cu(II) complexes, [Cu(L1) 2 (py) 2 ] and [Cu(L2) 2 (py) 2 (H 2 O)] (HL2= N-(5-(4-methylphenyl)-[1,3,4]–thiadiazole–2-yl)-benzenesulfonamide) were synthesized.The X-ray crystal structures of the complexes have been determined. Interaction of complexes with the DNA molecule and cytotoxicity studies were carried out.

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Acknowledgements

Adriana Hangan is thankful for the financial support offered by research grant Resurse Umane PNII -PD 474/2010.

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Authors and Affiliations

  1. Department of Inorganic Chemistry, Faculty of Pharmacy, University of Medicine and Pharmacy, Cluj-Napoca, 4000012, Romania

    ADRIANA CORINA HANGAN, SÎNZIANA CETEAN & LUMINIŢA SIMONA OPREAN

  2. National Institute for R&D of Isotopic and Molecular Technologies, Cluj-Napoca, 400293, Romania

    ALEXANDRU TURZA

  3. Department of Pharmaceutical Biochemistry and Clinical Laboratory, Faculty of Pharmacy, University of Medicine and Pharmacy, Cluj-Napoca, 4000012, Romania

    ROXANA LIANA STAN

  4. Paraclinic/Clinic Department, Faculty of Veterinary Medicine, University of Agricultural Science and Veterinary Medicine, Cluj-Napoca, 400372, Romania

    BOGDAN SEVASTRE & EMÖKE PÁLL

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  1. ADRIANA CORINA HANGAN
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  2. ALEXANDRU TURZA
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  3. ROXANA LIANA STAN
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  4. BOGDAN SEVASTRE
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  6. SÎNZIANA CETEAN
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  7. LUMINIŢA SIMONA OPREAN
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Correspondence to ROXANA LIANA STAN.

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Supplementary Information (SI)

Supplementary material has been deposited with the Cambridge Crystallographic Data Centre (nos. 1408834 (C1), 1410246 (C2) and available free of charge: eposit@ccdc.cam.ac.uk or http://www.ccdc.cam.ac.uk). All additional information pertaining to characterization of the complexes, namely, 1H-NMR, IR spectra. UV-Vis spectra, and EPR spectra (figures S1–S9) are available at www.ias.ac.in/chemsci.

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HANGAN, A.C., TURZA, A., STAN, R.L. et al. Synthesis, crystal structure and characterization of new biologically active Cu(II) complexes with ligand derived from N-substituted sulfonamide. J Chem Sci 128, 815–824 (2016). https://doi.org/10.1007/s12039-016-1077-1

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  • DOI: https://doi.org/10.1007/s12039-016-1077-1

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