Preparation,characterization and antifungal properties of transition metal ion complexes of quadridentate N3S ligands |
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Authors: | Mohammad Mizanur Rahman Mohammad Akbar Ali |
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Affiliation: | (1) Department of Chemistry, University of Chittagong, Bangladesh;(2) Department of Chemistry, University of Brunei Darussalam, BSB 3186, Brunei Darussalam |
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Abstract: | Summary New metal complexes [M(NNNS)X] (M = NiII, CuII, ZnII and CdII; NNNS– = anion of the quadridentate ligands formed from S-methyl- -N-(2-aminophenyl)-methylenedithiocarbazate and pyridine-2-aldehyde or 6-methylpyridine-2-aldehyde; X = Cl, NCS, NO3 or I) and [Co(NNNS)Cl2]·2H2O have been prepared and characterized by elemental analysis and conductance measurements. Magnetic and spectroscopic evidence support a five-coordinate structure for [M(NNNS)X] (M = NiII, CuII, ZnII and CdII; X = Cl, NCS) and a squareplanar structure for [Ni(NNNS)]X (X = NO3 or I). The [Co(NNNS)Cl3]·2H2O complex is low-spin and octahedral. The Schiff bases and some of their metal complexes were tested against three pathogenic fungi, Alternaria alternata, Curvularia geniculata and Fusarium palidoroseum. The metal complexes are less fungitoxic than the free ligands. |
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