Abstract
Four binuclear transition metal(II) complexes: [Co2L(μ-Cl)Cl2] · 2H2O, [Ni2L(μ-Cl)Cl2(H2O)2] · 2H2O, [Cu2L(μ-Cl)Cl2] · 2H2O and [Zn2L(μ-Cl)Cl2] · 2H2O, where LH is the binucleating ligand 2,6-diformyl-4-methylphenol bis(2-hydrazino benzothiazole), were prepared. Based on the i.r. spectra, elemental analysis, conductivity measurements and thermal analysis, we propose that these complexes contain an endogenous phenoxide bridge and an exogenous chloride bridge. Magnetic and spectral data supports the existence of a weak antiferromagnetic interaction between the metal ions, and octahedral for NiII and a square pyramidal environment for remaining complexes. The compounds show significant growth inhibitory activity against the fungi, Aspergillus niger and Candida albicans, as compared to antibacterial activity against Bacillus cirroflagellosus and Pseudomonas auregenosa.
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