Abstract
The interaction of β-D-glucurono-γ-lactone (D- glucurone) with AgNO 3, AgClO 4, AgCH 3COO and Ag 2CO 3 has been studied in aqueous solutions and solid compounds of the type Ag(D-glucurone)NO 3· H 2O, Ag(D-glucurone)ClO 4·H 2O and Ag(D-glucuronate) have been synthesized and characterized by means of FT-IR spectroscopy, X-ray powder diffraction and molar conductivity. Spectroscopic and other evidence showed that in the Ag(D-glucurone)X·H 2O (X = NO 3 − or ClO 4 − complexes the silver(I) ion is two-coordinate, binding to a lactone carbonyl oxygen atom (O6) and to a nitrate or perchlorate oxygen atom, whereas the Ag(D-glucuronate) salt is dimeric with each Ag(I) ion bonded to two sugar anions via O6 and 6′ carboxyl oxygen atoms, resulting in a linear two- coordinate geometry around each silver ion. Silver nitrate and silver perchlorate stabilized the lactone domination, while silver acetate or silver carbonate facilitated the sugar-to-acid conversion and the ionization of the sugar moiety in aqueous solutions.
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