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- W2034733349 abstract "Two novel linear polyamine ligands, N,N'-bis-(2-(N''-2-hydroxyl-5-bromobenzyl)aminoethyl) malondiamide (L 1 ) and N,N'-bis-(3-(N''-2-hydroxyl-5-bromobenzyl)aminopropyl) malondiamide (L 2 ), have been synthesized and fully characterized by elemental analysis ( 1 H NMR and IR spectroscopy) (Fig. 1). The binding ability of ligands L 1 and L 2 to metal ions such as Cu(II), Zn(II), Co(II), Mn(II), Mg(II), and Ca(II) has been investigated by the potentiometric method in 1,4-dioxanewater (v/v = 15:100) and KNO 3 (0.1 mol dm 3 ) at 25.0°C. In view of the linear structures of L 1 and L 2 , binuclear metal complexes can be formed in solution by controlling Cu(II)-5-substituted o-phenanthroline (Rphen, R = CH 3 , H, Cl, NO 2 ):L to a 2:1 molar ratio, whereas the mononuclear metal complexes form at molar ratio M(II):L of 1:1, where M(II) is Cu(II), Zn(II), Co(II), Mn(II), Mg(II), and Ca(II). The stability constants of metal complexes have been determined and further discussed. In addition, two manganic complexes have been synthesized and IR and electronic spectra showed their coordination nature.Key words: linear polyamine ligand, 5-substituted o-phenanthroline, mononuclear and binuclear metal complex, stability, spectrum." @default.
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- W2034733349 date "2001-04-01" @default.
- W2034733349 modified "2023-10-16" @default.
- W2034733349 title "Potentiometric titration study of two novel polydenate ligands and investigations of their complexes" @default.
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- W2034733349 doi "https://doi.org/10.1139/v01-014" @default.
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