Probing Halide Distribution in [AlX^sub 4^]- Anions via ^sup 27^Al NMR: Application of the Pairwise-Additivity Model

A laboratory exercise using ...Al NMR spectrometry to study the tetrahedral tetrahaloaluminate anions has been developed. Spectra of the homoleptic complexes [AlX...]... and the dihalide anions [AlX...Y...]... (X, Y = Cl, Br, or I) are acquired, then the pairwise-additivity concept developed by Vlad...

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Bibliographic Details
Published in:Journal of chemical education 2011-03, Vol.88 (3), p.309
Main Authors: Davis, Craig M, Dixon, Bridget M
Format: Article
Language:English
Subjects:
Aluminum
Anions
Atoms & subatomic particles
Chemical compounds
Chemical equilibrium
Inorganic chemistry
NMR
Nuclear magnetic resonance
Organic chemistry
Science education
Scientific imaging
Spectrometry
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Summary:A laboratory exercise using ...Al NMR spectrometry to study the tetrahedral tetrahaloaluminate anions has been developed. Spectra of the homoleptic complexes [AlX...]... and the dihalide anions [AlX...Y...]... (X, Y = Cl, Br, or I) are acquired, then the pairwise-additivity concept developed by Vladimiroff and Malinowski is used to predict the chemical shifts of the trihalide anions [AlCl...Br...I...]... The relationship between the ...Al NMR chemical shift and the charge on the central aluminum atom (calculated with molecular modeling) is investigated, as well as the relationship between the symmetry of the anions and the line width of their respective resonances. (ProQuest: ... denotes formulae/symbols omitted.)
ISSN:0021-9584
1938-1328