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  • Title: On the basics of carbohydrate-metal chemistry: complexes of palladium(II) with hydroxyaldehyde and -ketone hydrates.
    Author: Allscher T, Klüfers P, Labisch O.
    Journal: Carbohydr Res; 2007 Aug 13; 342(11):1419-26. PubMed ID: 17532305.
    Abstract:
    In this work, we present novel complexes of hydroxyaldehydes and ketones with palladium(II). The compounds are studied by two-dimensional NMR spectroscopy in solution (COSY, HMQC, HMBC). Glycolaldehyde, d-glyceraldehyde, glyoxal and 2,4-O-ethylidene-d-erythrose were used as aldehydes, d-erythrulose was used as an alpha-hydroxyketone. Although different species are present in solution, only the hydrated forms of the aldehydes can coordinate to the metal centre. These complexes are stable at 4 degrees C in aqueous solution. The crystal structure of a complex formed by mesoxalic acid and palladium(II) is reported and shows coordination by both hydroxy groups of the hydrated ketone.
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