Global Journal of Pure and Applied Chemistry Research (GJPACR)

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Synthesis and characterization of new metal complexes with n3 donor Schiff base derived from 2-thiazolamine


A 2,6-diacetylpyridine based novel acyclic tridentate compartmental ligand (E)-N-(1-(6-((E)-1-(thiazol-5-ylimino)ethyl)pyridin-2-yl)ethylidene)thiazol-2-amine was prepared. The free ligand has prepared by condensation reaction of two moles of 2,6-diacetylpyridine with one mole of 2-aminothiazole in methanol medium.The direct reactions of metal chlorides of Mn(II),Co(II), Ni(II), Cu(II), Zn(II) and vanadyl sulphate with the new ligand results in the formation of deep colored metal complexes in the formula [MLCl]Cl and [VOL(SO4)] respectively,where M=Mn,Co,Ni,Cu and Zn(II) ions.The free ligand and its metal complexes were characterized by elemental analyses, conductivity measurements, magnetic susceptibility data, IR, UV-Vis, NMR and FAB mass spectral data.The physical measurements and FTIR spectral data reveal that Mn(II),Ni(II) and Zn(II) complexes were tetrahedral environment around metal ion(II),in contrast the vanadyl complex was square pyramidal due to linkage of sulphato ion to vanadium(IV) ion with neutral properties in DMF solution. However,the cobalt (II) complex was proposed as octahedral geometry in the formula [CoL(H2O)2Cl2].

Keywords: 6-Diacetylpyridine, Metal Complexes of Acyclic Ligands, Schiff Bases of 2

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