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Aluminum solvate complexes forming in acidic methanol-acetone mixtures studied by 27Al NMR spectroscopy

Samadi Maybodi, A ; Sharif University of Technology | 2009

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  1. Type of Document: Article
  2. DOI: 10.1007/s10953-008-9364-1
  3. Publisher: 2009
  4. Abstract:
  5. 27Al NMR spectroscopy is a powerful tool for the study of coordination and solvation in both aqueous and nonaqueous solutions. In this study, the complexes coexisting upon dissolution of AlCl3 in acidic acetone + methanol solutions are shown to consist essentially of mixed hexacoordinated species of the general formula [Al(CH3OH) 6-n (CH3COCH3) n ]3+ (n=1,2 and 3), all exhibiting distinctly different 27Al shielding effects. The relative populations of the various mixed species are found to be highly dependent upon the acetone:methanol mole ratio that in the more acetone-rich mixtures with aluminum become appreciably coordinated by acetone. The results demonstrate that the key factor for the formation of acetone-containing species in acidic methanolic solutions is having the CH 3COCH3:CH3OH mole ratio at 3:1. © 2008 Springer Science+Business Media, LLC
  6. Keywords:
  7. 27Al NMR ; Acidic methanolic ; Aluminum(III) complexes ; Methanol-acetone solutions
  8. Source: Journal of Solution Chemistry ; Volume 38, Issue 2 , 2009 , Pages 159-169 ; 00959782 (ISSN)
  9. URL: https://link.springer.com/article/10.1007/s10953-008-9364-1