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Mixed ligand complexes of Metformin and Isoniazid have been synthesized and characterized by solubility studies, percentage metal analysis, UV-Vis spectroscopy, IR spectroscopy, magnetic moments and conductivity measurements. The infrared spectra revealed the coordination of the ligands to the metal ions [manganese(II), cobalt(II), nickel(II), copper(II) and zinc(II)]. Meformin coordinated as a bidentate ligand via the imine nitrogen while isoniazid coordinated through its amino nitrogen (NH) and carbonyl oxygen (C=O). The electronic 2 spectra and magnetic moments for the complexes strongly suggested a six coordinate octahedral geometry. The-1 2-1 molar conductance values of the complexes are within the range 0.45-8.72 Ω cm mol , and this confirms the non-electrolytic nature of the complexes.

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