Synthesis, spectroscopic characterization and electrochemical studies of Girard's T chromone complexes
| Autor: | Sameerah I. Al-Saeedi, Abdel-Nasser M.A. Alaghaz, Reda A. Ammar |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Ligand field theory
010405 organic chemistry Ligand Organic Chemistry Inorganic chemistry chemistry.chemical_element 010402 general chemistry 01 natural sciences Copper 0104 chemical sciences Analytical Chemistry Inorganic Chemistry Metal Nickel Crystallography Octahedron chemistry visual_art Octahedral molecular geometry visual_art.visual_art_medium Cobalt Spectroscopy |
| Zdroj: | Journal of Molecular Structure. 1111:201-213 |
| ISSN: | 0022-2860 |
| Popis: | Complexes of cobalt(II), nickel(II), copper(II) and zinc(II) of general composition [M(L)2] have been. The elemental analyses, molar conductance, spectral, magnetic moment and thermal measurements studies of the compounds led to the conclusion that the ligand acts as a tridentate manner (OON). The molar conductance of the metal complexes in fresh solution of DMSO lies in the range of 8.10–10.18 Ω−1 cm2 mol−1 indicating their non-electrolytic behavior. On the basis of analytical and spectroscopic techniques, octahedral geometry of the complexes was proposed. The ligand field parameters were calculated for Co(II), Ni(II) and Cu(II) complexes and their values were found in the range reported for a octahedral structure. The data show that the complexes have composition of ML2 type. The activation of thermodynamic parameters are calculated using different equations. The octahedral geometry of the complexes is confirmed using DFT method from DMOL3 calculations and ligand field parameters. The cyclic voltammograms of the Cu(II)/Co(II)/Ni(II) complexes investigated in DMSO solution exhibit metal centered electroactivity in the potential range −1.5 to +1.5 V. The electrochemical data obtained for Cu(II) complexes explains the change of structural arrangement of the ligand around Cu(II) ions. |
| Databáze: | OpenAIRE |
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