Abstract
Tungstate complexes of alditols have been studied in aqueous solution by 183 W and 13 C NMR spectroscopies. The ligands used in this work may chelate a ditungestate group though several different sites having erythro of threo configurations and therefore yield mixtures of complexes. The structural type of each complex was defined by the characteristic pattern of its 183 W NMR spectrum, and the sites of chelation were identified by 13 C NMR spectroscopy Alditols which possess an asymmetrical site of erythro configuration (D-arabinitol, D-mannitol, D-glucitol) form two isomeric complexes, as this tetradentate site can be occupied in two reversed orientations
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