Russian Journal of Inorganic Chemistry

, Volume 63, Issue 6, pp 843–850 | Cite as

Environment of the Al3+ ion in Water–Acetone Solutions of Aluminum Chloride

  • G. P. PanasyukEmail author
  • A. K. Lyashchenko
  • L. A. Azarova
  • E. G. Tarakanova
  • G. V. Yukhnevich
  • L. I. Demina
  • S. A. Pershikov
  • B. G. Balmaev
Physical Chemistry of Solutions


Water–acetone solutions in the AlCl3–(CH3)2CO–H2O and AlCl3–(CH3)2CO–H2O–HCl systems were obtained and studied. In both cases, the solution separated into layers to form liquid fractions of lower and higher density. The IR spectra of the fractions were studied. In the light fraction, no AlCl3 was present, but hydrogen-bonded acetone–water complexes were detected. The spectra of the heavy fraction exhibited a broad band at ~3020–3040 cm–1 corresponding to the OH groups of water from aluminum hexahydrate. As the solvent is evaporated, the band narrows down, with its position being retained. The IR spectrum of the obtained solid becomes identical to the IR spectrum of the crystal hydrate AlCl3.(H2O)6. The structures and spectral and energetic parameters of Al(H2O) 6 3+ , Al(H2O) 6+12 3+ , Al((CH3)2CO) 6 3+ , Al((CH3)2CO) 4 3+ , and (CH3)2CO.H2O were calculated by the density functional theory method (B3LYP/6-31++G(d,p)). Relying on the results, an explanation was proposed for the experimentlly observed absence of acetone molecules in the Al3+ first coordination shell.


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Copyright information

© Pleiades Publishing, Ltd. 2018

Authors and Affiliations

  • G. P. Panasyuk
    • 1
    Email author
  • A. K. Lyashchenko
    • 1
  • L. A. Azarova
    • 1
  • E. G. Tarakanova
    • 1
  • G. V. Yukhnevich
    • 1
  • L. I. Demina
    • 1
    • 2
  • S. A. Pershikov
    • 1
  • B. G. Balmaev
    • 3
  1. 1.Kurnakov Institute of General and Inorganic ChemistryRussian Academy of SciencesMoscowRussia
  2. 2.Frumkin Institute of Physical Chemistry and ElectrochemistryRussian Academy of SciencesMoscowRussia
  3. 3.Baikov Institute of Metallurgy and Materials ScienceRussian Academy of SciencesMoscowRussia

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