Preparation, characterization and thermal studies of some transition metal ternary complexes |
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Authors: | E R Souaya E H Ismail A A Mohamed and N E Milad |
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Institution: | (1) Chemistry Department, Faculty of Science, Ain Shams University, Abbassia, Cairo, Egypt |
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Abstract: | Ternary complexes of Co(II), Ni(II), Cu(II) and Zn(II) with nitrilotriacetic acid as a primary ligand and glycine as secondary
ligand were prepared in slightly acid medium. Their molecular masses were determined by acid-base titration against standard
potassium hydroxide solution. Their molecular structures were found to be M (HNTA)(glyH)(2H2O)]. Thermogravimetric analysis confirmed this structure and that the water present is coordinated to the central metal atom.
UV-Vis spectra showed that the complexes have octahedral symmetry. IR spectra suggested the presence of intermolecular hydrogen
bonding. This phenomenon was supported by mass spectra. The ionization constants of these complexes, as diprotic acids, were
determined. |
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Keywords: | |
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