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Lanthanide-induced shifts in the 17O NMR spectra of 1,6-anhydro-β-D-hexopyranoses. Evidence for tridentate complexing

✍ Scribed by J. Schulte; J. Lauterwein

Publisher: John Wiley and Sons
Year: 1992
Tongue: English
Weight: 220 KB
Volume: 30
Category: Article
ISSN: 0749-1581
DOI: 10.1002/mrc.1260300411

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✦ Synopsis

Abstract

The complexation of four 1,6‐anhydro‐β‐D‐hexopyranoses with europium(III) was studied in aqueous solution by natural abundance ^17^O NMR. The paramagnetic ion induced contact shifts of individual hydroxy and ether resonances to low frequency. A clear indication of tridentate complexes was obtained, proving the involvement of the oxygen atom of the anhydro ring in talosan and mannosan and that of the pyranose ring in glucosan.

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