Preparation, characterization and kinetics of formation of some Schiff base chelates of Sn(II) and UO2(VI)


Erk B., Dilmac A., Baran Y., Balaban A.

SYNTHESIS AND REACTIVITY IN INORGANIC AND METAL-ORGANIC CHEMISTRY, vol.30, no.10, pp.1929-1938, 2000 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 30 Issue: 10
  • Publication Date: 2000
  • Doi Number: 10.1080/00945710009351879
  • Title of Journal : SYNTHESIS AND REACTIVITY IN INORGANIC AND METAL-ORGANIC CHEMISTRY
  • Page Numbers: pp.1929-1938

Abstract

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.