Spectroscopic and electrochemical studies of ruthenium and osmium complexes of salicylideneimine-2-thiophenol Schiff base |
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Authors: | Khalil M M H Aboaly M M Ramadan R M |
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Institution: | Chemistry Department, Faculty of Science, Ain Shams University, Cairo, Egypt. |
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Abstract: | The reactions between M(3)(CO)(12)], M = Ru and Os, and salicylideneimine-2-thiophenol Schiff base in THF under reflux gave Ru(CO)(4)(satpH)] and Os(CO)(3)(satpH(2))] complexes. Structures of the two complexes were proposed on the basis of spectroscopic studies. Magnetic study of Ru(CO)(4)(satpH)] suggested that a change in oxidation state of the ruthenium atom from zero to +1 was achieved via oxidative addition of the SH group with a proton displacement to give a low-spin d(7) electronic configuration. UV-Vis spectra of the two complexes in different solvents exhibited visible bands due to metal-to-ligand charge transfer. Electrochemical investigation of the free ligand and complexes showed some cathodic and anodic irreversible peaks due to interconversions through electron transfer. |
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