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ERIC Number: EJ925951
Record Type: Journal
Publication Date: 2011-Mar
Pages: 2
Abstractor: As Provided
Reference Count: 6
ISBN: N/A
ISSN: ISSN-0021-9584
Probing Halide Distribution in [AlX[subscript 4]]- Anions via [superscript 27]Al NMR: Application of the Pairwise-Additivity Model
Davis, Craig M.; Dixon, Bridget M.
Journal of Chemical Education, v88 n3 p309-310 Mar 2011
A laboratory exercise using [superscript 27]Al NMR spectrometry to study the tetrahedral tetrahaloaluminate anions has been developed. Spectra of the homoleptic complexes [AlX[subscript 4]]-and the dihalide anions [AlX[subscript 4]Y[subscript 4-n]]-(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[subscript m]Br[subscript n]I[subscript 4-m-n]][superscript -]. The relationship between the [superscript 27]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. (Contains 2 tables and 3 notes.)
Division of Chemical Education, Inc and ACS Publications Division of the American Chemical Society. 1155 Sixteenth Street NW, Washington, DC 20036. Tel: 800-227-5558; Tel: 202-872-4600; e-mail: eic@jce.acs.org; Web site: http://pubs.acs.org/jchemeduc
Publication Type: Journal Articles; Reports - Descriptive
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A