Abstract Monomeric [Cu(DCA–OEt) 2 ] and polymeric [Cu(DCA) 2 (DMF) 2 ] n complexes (where DCA is dicyanamide, DCA–OEt is in situ formed ligand, and DMF is dimetylformamide) derived from sodium dicyanamide are synthesized and their structures are characterised by spectroscopic and analytical methods. Molecular structures of the complexes are determined by single crystal X-ray diffraction studies. In the structure of the polymeric complex [Cu(DCA) 2 (DMF) 2 ] n , the DCA anions are bridges between Cu(II) ions through the terminal nitrile N atoms, forming a 1D ladder-like coordination polymer chains. The DCA–OEt ligand in the monomeric [Cu(DCA–OEt) 2 ] complex is formed by the nucleophilic addition of ethanol to the DCA nitrile groups, resulting in a bidentate chelate ligand. The antibacterial activity of the structurally characterised complexes are evaluated by by agar-well diffusion. The complexes exhibit a comparable antibacterial activity against some bacteria to the standart antibiotics (amikacin and gentamicin).

中文翻译：

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源自双氰胺的单体和一维聚合 Cu(II) 配合物：结构表征和抗菌性能

摘要 衍生自双氰胺的单体 [Cu(DCA-OEt) 2 ] 和聚合物 [Cu(DCA) 2 (DMF) 2 ] n 复合物（其中 DCA 是双氰胺，DCA-OEt 是原位形成的配体，DMF 是二甲基甲酰胺）合成并通过光谱和分析方法表征它们的结构。复合物的分子结构由单晶 X 射线衍射研究确定。在聚合物络合物[Cu(DCA) 2 (DMF) 2 ] n 的结构中，DCA阴离子是Cu(II)离子通过末端腈N原子之间的桥梁，形成一维梯状配位聚合物链。单体 [Cu(DCA-OEt) 2 ] 复合物中的 DCA-OEt 配体是通过乙醇与 DCA 腈基团的亲核加成形成的，从而形成双齿螯合配体。通过琼脂井扩散评估结构特征复合物的抗菌活性。该复合物对某些细菌的抗菌活性与标准抗生素（阿米卡星和庆大霉素）相当。