Complex formation equilibria of diethyltin(IV) with five N-D-gluconylamino acids in aqueous solution (I = 0.1 M, NaClO4) were studied and the stabilities of the species were determined by potentiometric titrations. Diethyltin(IV) complexes of a-amino acid derivatives are water-soluble in the physiological pH range, while in the presence of N-D-gluconyl-β-alanine a precipitate is formed, which dissolves with increasing pH.13C NMR measurements showed that in the N-D-gluconyl-α-amino acid complexes the ligand is coordinated through its deprotonated carboxylate oxygen, amide nitrogen and C(2)-hydroxy group, while for the soluble N-D-gluconyl-β-alanine complex the ligand is coordinated via the deprotonated carboxylate and C(3)-, C(4)-, C(5)-hydroxy groups. Mossbauer measurements reflected the geometry of the complexes formed.
|Number of pages||9|
|Journal||Zeitschrift fur Naturforschung - Section B Journal of Chemical Sciences|
|Publication status||Published - Apr 1 1995|
- Mössbauer Spectra
- N-D-Gluconylamino Acid Complexes
- NMR Spectra
ASJC Scopus subject areas