Spectrophotometric and Electric Studies on the Ligand 4–(4`–Phenyl–2`–Thiazolylazo) Resorcinol and Its Complexation with Some Metal Ions
DOI:
https://doi.org/10.54172/mjsc.v26i1.201Abstract
The ligand 4-(4`–phenyl–2'– thiazolylazo)–resorcinol (L) was prepared. The ionization constants of the ligand (pka) and the stability constants of their complexes with Co(II), Ni(II), Cu(II), Zn(II) and Cd(II) have been estimated spectrophotometrically and pH–metrically at 298 K. The effect of some organic solvent and the pH on the absorption spectra of the ligand and its complexation with above cations was studied and discussed.
The use of this ligand for spectrophotometric determination of the cations under investigation was also studied. Stoichiometric complexes with ratios 1:1 and 1:2 (M:L) were formed for all used cations except Cd(II) which form only 1:1 stoichiometric complex. Also conductometric study has been carried out and the results show that the same stoichiometric complexes have been formed in solution.
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