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Spectroscopic studies of aluminum and gallium complexes with oxalate and malonate in aqueous solution

Author:
  • M. Clausen
  • L. O. Ohman
  • K. Axe
  • Per Persson
Publishing year: 2003
Language: English
Pages: 225-235
Publication/Series: Journal of Molecular Structure
Volume: 648
Document type: Journal article
Publisher: Elsevier
Additional info: 3

Abstract english

The local structures of Ga(III) in aqueous oxalate and malonate complexes were studied by means of Ga K-edge EXAFS spectroscopy. Irrespective of the number and type of coordinated ligands, the EXAFS results showed very regular first coordination shells consisting of six oxygen atoms. Scattering paths from more distant atoms revealed that both oxalate and malonate form mononuclear chelate structures where one oxygen from each carboxylate group binds to Ga(III). Again, very little variation in bond distances and no changes in coordination modes were detected as the number of ligands coordinated to Ga(III) was varied. Based on the very close resemblance of IR spectra of oxalate and malonate complexes of Al(III), and the corresponding complexes of Ga(III), it is believed that the local structures of the Al(III) complexes are similar to those of the Ga(III) complexes in terms of ligand coordination modes and distortions. This conclusion was corroborated by results from theoretical frequency calculations. (C) 2003 Elsevier Science B.V. All rights reserved.

Keywords

  • Earth and Related Environmental Sciences

Other

Published
  • ISSN: 0022-2860
Per Persson
E-mail: per [dot] persson [at] biol [dot] lu [dot] se

Professor

MEMEG

+46 46 222 17 96

+46 70 266 38 79

E-C350

50

Professor

Centre for Environmental and Climate Research (CEC)

+46 46 222 17 96

+46 70 266 38 79

D350

Ekologihuset, Sölvegatan 37, Lund

50