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首页> 外文期刊>Polyhedron: The International Journal for Inorganic and Organometallic Chemistry >New copper(II) complexes of 2-hydroxyacetophenone N(4)-substituted thiosemicarbazones and polypyridyl co-ligands: structural, electrochemical and antimicrobial studies
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New copper(II) complexes of 2-hydroxyacetophenone N(4)-substituted thiosemicarbazones and polypyridyl co-ligands: structural, electrochemical and antimicrobial studies

机译:新的2-羟基苯乙酮N(4)取代的硫代氨基甲唑酮和聚吡啶基共配体的铜(II)配合物:结构,电化学和抗菌研究

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摘要

Seven new copper(II) complexes of 2-hydroxyacetophenone N(4)-substituted thiosemicarbazones (H2L) and bidentate polypyridyl compounds 2,2'-bipyridine and 1,10-phenanthroline (B) were prepared and characterized. The thiosemicarbazones bind to the metal as dianionic ONS donors (L2-) and yield compounds of the stochiometry [MLB]. The structure of the compound [Cu(L-4)(2,2'-bipy)] (6) was investigated by single-crystal X-ray diffraction method. Spin Hamiltonian and bonding parameters of the compounds calculated from the EPR spectra suggest square pyramidal (SPY) structure for the compounds. The g values predict geometry of C-4v symmetry with B-1g ground state. The bonding parameters show significant in-plane pi-bonding. The cyclic voltam-metric study of the complexes shows irreversible redox peaks corresponding to Cu(II/I) couple and quasi-reversible redox peaks corresponding to copper(II/III) oxidation. The thiosemicarbazones and their copper complexes show significant growth inhibitory activity against bacteria Escherichia coli, Staphylococcus aureus, and fungi Candida albicans and Aspergillus flavus. (C) 2004 Elsevier Ltd. All rights reserved.
机译:制备并表征了7种新的2-羟基苯乙酮N(4)取代的硫代氨基甲唑酮(H2L)和二齿多吡啶基化合物2,2'-联吡啶和1,10-菲咯啉(B)的铜(II)配合物。硫代半咔唑酮作为阴离子ONS供体(L2-)与金属结合,产生化学计量比的化合物[MLB]。通过单晶X射线衍射法研究了化合物[Cu(L-4)(2,2'-bipy)](6)的结构。自旋哈密顿量和由EPR光谱计算得出的化合物的键合参数表明该化合物具有方形金字塔(SPY)结构。 g值预测具有B-1g基态的C-4v对称性的几何形状。键合参数显示出显着的平面pi键合。配合物的循环伏安法研究表明,对应于Cu(II / I)对的不可逆氧化还原峰和对应于铜(II / III)氧化的准可逆氧化还原峰。硫半脲及其铜配合物对大肠杆菌,金黄色葡萄球菌,真菌白色念珠菌和黄曲霉具有显着的生长抑制活性。 (C)2004 Elsevier Ltd.保留所有权利。

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