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Six-coordinate cadmium(II) complex containing a bridging dithiolate ligand: synthesis, crystal structure and antifungal activity study

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A mixed-ligand polymeric metal complex of Cd(II) has been prepared by reactions of Cd(NO3)2·4H2O with 1,3-diaminopropane (tn) and potassium salt of 1,1-dicyanoethylene-2,2-dithiolate and characterized on the basis of spectroscopy and single-crystal X-ray diffraction analysis. Single-crystal X-ray diffraction analysis reveals that the Cd(II) complex crystallizes in monoclinic space group P2 1 /n with distorted octahedral coordination geometry. The Cd(II) complex was screened in vitro against fungal pathogens such as Synchytrium endobioticum, Pyricularia oryzae, Helminthosporium oryzae, Candida albicans (ATCC10231), and Trichophyton mentagrophytes by the disk diffusion method. The biological testing data of the primary ligand K2i-MNT·H2O and [Cd(tn)(i-MNT)]n indicate that the complex exhibits fungistatic antifungal activity, whereas K2i-MNT·H2O has no activity. The fungicidal properties of [Cd(tn)(i-MNT)]n showed that the cadmium complex was more bioactive than the parent ligand.
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Keywords: 1,1-Dicyanoethylene-2,2-dithiolate; 1,3-Diaminopropane; 2D chain structure; Mixed-ligand complex Cd(II); X-ray diffraction; antifungal activity

Document Type: Research Article

Affiliations: 1: Department of Chemistry, Tripura University, Agartala, India 2: Department of Chemistry, Govt. Degree College, Dharmanagar, India 3: Department of Inorganic and Structural Chemistry, Howard University, Washington, DC, USA 4: Department of Botany, R.K. Mahavidyalaya, Kailashahar, India 5: Department of Chemistry, Ramthakur College, Agartala, India

Publication date: January 2, 2016

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