Unusual coordination behavior of D-fructose towards dimethyltin(IV): Metal-promoted deprotonation of alcoholic OH groups in aqueous solutions of low pH

Norbert Buzás, Tamás Gajda, László Nagy, Ernö Kuzmann, Attila Vértes, Kálmán Burger

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

To study the effect of the conformation of sugar hydroxy groups on metal complexation processes, complex formation of eight saccharides (D-fructose, L-sorbose, L-arabinose, D-arabinose, D-glucose, D-sorbitol, 2-deoxy-D-glucose and D-saccharose) with dimethyltin(IV) cations was investigated in aqueous solution by potentiometric equilibrium measurements, 13C NMR, polarimetric and Mössbauer spectroscopic methods. The experimental results proved that deprotonation of D-fructose and L-sorbose is caused by the coordination of dimethyltin(IV) in the unusual low pH interval 4-6 in contrast to the other saccharides deprotonated in analogous way at pH>8. Increasing the pH of the solution resulted in the formation of further complexes. Stability and composition of the species was determined by potentiometric studies. 13C NMR measurements led to the assignment of the sugar OH groups participating in the processes. Mössbauer investigations in the quick-frozen solutions permitted the determination of the stereochemistry of tin(IV) in the complexes.

Original languageEnglish
Pages (from-to)167-176
Number of pages10
JournalInorganica Chimica Acta
Volume274
Issue number2
DOIs
Publication statusPublished - Jun 15 1998

Keywords

  • D-fructose complexes
  • Diorganotin(IV) complexes
  • Sugar complexes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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