Aluminium-27 Solid-State NMR Study of Aluminium Coordination Complexes of Alizarin
| Autor: | Patrick Soubayrol, Gilbert Dana, Pascal P. Man |
|---|---|
| Rok vydání: | 1996 |
| Předmět: |
chemistry.chemical_classification
Tetrahydrate Chemical shift Inorganic chemistry chemistry.chemical_element General Chemistry Alizarin Coordination complex chemistry.chemical_compound Crystallography chemistry Solid-state nuclear magnetic resonance Aluminium Molecule General Materials Science Chelation |
| Zdroj: | Magnetic Resonance in Chemistry. 34:638-645 |
| ISSN: | 1097-458X 0749-1581 |
| DOI: | 10.1002/(sici)1097-458x(199608)34:8<638::aid-omr926>3.0.co;2-5 |
| Popis: | binuclear complex [ AI,(p-OH),(C,,H,0,),(Na)4(H~O)4] was obtained, which is stable as the tetrahydrate and is observed even in the gas phase by electrospray mass spectrometry. With potassium hydroxide the monohydrate form is obtained. These two products are distinguishable by 27AI NMR in the solid state by means of their chemical shifts (+23.1 and 0.0 ppm) and their linewidths AV,,~ (1200 and 4000 Hz). The chemical shifts of these binuclear complexes or similar derivatives are discussed in relation to possible chelation of the four molecules of water with alizarinate entities according to the bulk of the cation. The results are illustrated by two types of structure, named 'closed structure' (with strongly chelated H,O molecules and dibenzene sandwich Na+) and 'open structure'. |
| Databáze: | OpenAIRE |
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