Abstract
2-(o-Hydroxyphenyl)-1,8-naphthyridine (HN), 2-(4-hydroxy-6-methylpyran-2-one-3-yl)-1,8-naphthyridine (HMPN) and 2-(benzimidazol-2-yl)-1,8-naphthyridine(BN) react with acetates of Mn(II), Co(II), Ni(II), Cu(II) and Zn(II) to yield metal ion complexes of definite composition. These compounds were characterized by elemental analyses, molar conductivity, magnetic susceptibility measurements, thermal studies, IR, UV-visible, NMR and mass spectral investigations. The complexes are found to have the formulae [M(HN)2(H2O)2], [M(HMPN)2(H2O)2] and [M(BN)2(OAc)2], respectively.
Highlights
Interest in coordination chemistry is increasing continuously with the preparation of organic ligands containing a variety of donor groups [1,2,3] and it is multiplied manyfold when the ligands have biological importance [4,5]
As part of our research, we have developed a number of polydentate ligands containing amide groups [6,7,8,9,10,11]. 1,8-Naphthyridines constitute a group of very important
We report the results of our studies on chelating properties of substituted 1,8-naphthyridines, i.e., 2-(ohydroxyphenyl)-1,8-naphthyridine (HN), 2-(4-hydroxy-6-methylpyran-2-one-3-yl)-1,8-naphthyridine (HMPN) and 2-(benzimidazol-2-yl)-1,8-naphthyridine (BN) and the characterization of their corresponding Mn(II), Co(II), Ni(II), Cu(II) and Zn(II) complexes
Summary
Interest in coordination chemistry is increasing continuously with the preparation of organic ligands containing a variety of donor groups [1,2,3] and it is multiplied manyfold when the ligands have biological importance [4,5]. The ligands HN, HMPN and BN exhibit their highest mass peaks at m/z 223, 254 and 246, respectively, corresponding to the [M+1]+ ions.
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