Formation of oligonuclear complexes between copper(II) and 1-hydroxyethane-1,1-diphosphonic acid

Saad Bouhsina, Péter Buglyó, Edmond Abi Aad, Antoine Aboukais, Tamás Kiss

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Abstract

The complex formation between Cu(II) and 1-hydroxyethane-1,1-diphosphonic acid was studied by means of pH-potentiometry and spectroscopy (UV-Vis and EPR). Speciation revealed the formation of a trinuclear complex [Cu3A 3]6- besides the mononuclear 1:1 and 1:2 species. In the complex [Cu3A3]6- , which is not formed with other diphosphonic derivatives, the ligands adopt chelating and bridging modes via the four O atoms of the two phosphonates, the alcoholic-OH groups remaining in the protonated form.

Original languageEnglish
Pages (from-to)305-310
Number of pages6
JournalInorganica Chimica Acta
Volume357
Issue number1
DOIs
Publication statusPublished - Jan 9 2004

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Keywords

  • Bioinorganic chemistry
  • Copper(II)
  • Phosphonates
  • Speciation
  • Spectroscopy

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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