Preparation, characterization and kinetics of formation of some Schiff base chelates of Sn(II) and UO<sub>2</sub>(VI)
Y Baran, B Erk, A Dilmac, A Balaban
article (Uluslararası, Hakemli) | Yazar(lar): Y Baran, B Erk, A Dilmac, A Balaban | Yıl: 2000 | Dergi/Kurum: SYNTHESIS AND REACTIVITY IN INORGANIC AND METAL-ORGANIC CHEMISTRY | İndeks: WOS.SCI,WOS.IC — Özet: The synthesis, characterization and formation kinetics of Sn(II) and UO2(VI) complexes of the nitrogen and oxyge
The synthesis, characterization and formation kinetics of Sn(II) and UO2(VI) complexes of the nitrogen and oxygen donor ligands m-chlorophenylsalicylaldimine (Hcps), m-nitrophenylsalicylaldimine (Hnps), m-methoxyphenylsalicylaldimine (Hmps) and m-methylphenylsalicylaldimine (Hmsa) are reported. The structures of the free ligands and their Sn(II) and UO2(VI) complexes were determined by NMR, elemental analyses, IR and UV-Vis studies and magnetic susceptibility measurements. Under pseudo-first order conditions, having an excess of the Schiff base present, the kinetics of complex formation of Sn(II) and UO2(VI) with a series of Schiff bases was studied spectrophotometrically using the stopped-flow technique in methanol as solvent. The activation parameters DeltaH(#) and DeltaS(#) for the formation reactions of the complexes studied in methanol are almost identical which supports the assumption that the reactions have a common mechanism The reactions are considered to proceed through an associative mechanism.