| Abstract: | Symmetrical bis (7-formyanil substituted-8-hydroxyquinoline-5-sulfonic acid), Schiff bases, react with Co(II), Ni(II) and Cu(II) ions to give MnL (n=1, 2) complexes as established by conductometric titration in 1 : 1 DMF: H2O. The complexes were identified by elemental analyses, molecular weight determination, thermal analysis, infrared, magnetic moments, electronic absorption, and electron spin resonance spectra. The suggested general geometry for these complexes may have a tetrahedral crystal structure and the general formula is M2L(OH24], where M(II) = Co, Ni and Cu and L = 7―X―H2 L(―X―= dimethyl, p-phenyl, o-phenyl), while for the, trimethyl, ligand and the tetrahedral crystal structure has the general formula M2L(OH2)2].Antimicrobial activity of these ligands and their transition metal complexes has been investigated on some common fungi and bacteria. A considerable increase in the biocide acticity of these ligands has been observed on coordination with transition metal ions, therefore, these complexes can be used in the chemotherapy of candidiaces and other fungal skin diseases. |
