Synthetic and Characterization of Some new Schiff bases Complexes with CoII, NiII, CuII and PdII ions
| Autor: | Muhanned J. Mahmoud, Ahmad .T. Numan, Omar B. M. S. Al-Obaidi |
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| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | Journal of Al-Nahrain University Science. 16:28-36 |
| ISSN: | 2519-0881 1814-5922 |
| DOI: | 10.22401/jnus.16.1.05 |
| Popis: | A new ligand (H4L) and its complexes with (Co II , Ni II , Cu II and Pd II ). This ligand was prepared in two steps, in the first step a solution of terephthaldehyde in methanol reacted under refluxe with 1,2-phenylenediamine to give precursore compound which reacted in the second step with 2,4dihydroxybenzaldehyde to give the ligand. The complexes were synthesized by direct reaction of the corresponding metal chloride with the ligand. The ligand and complexes were characterized by spectroscopic methods [FT-IR, UV-vis, 1 HNMR, HPLC and atomic absorption], chloride contant in addition to conductivity measurement. The stability constant K and Gibbs free energy ∆G were calculated for [[Ni2(H2L)Cl2], [Cu2(H2L)Cl2] complexes using spectrophotometer method. The obtained values indicate that these complexes are stable in their solution. The data of these measurements suggest a distorted tetrahedral geometry for Co II , Ni II , and Cu II complexes and a square planar for Pd II complex. The biological activity for the ligand (H4L), and its complexes [Ni2(H2L)Cl2], [Pd2(H2L)Cl2] were studied. |
| Databáze: | OpenAIRE |
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