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Acta Cryst. (2012). E68, o3180-o3181
[ doi:10.1107/S1600536812041992 ]

Methyl 3-O-[alpha]-L-fucopyranosyl [beta]-D-glucopyranoside tetrahydrate

L. Eriksson and G. Widmalm

Abstract: The title compound, C13H24O10·4H2O, is the methyl glycoside of a disaccharide structural element present in the backbone of the capsular polysaccharide from Klebsiella K1, which contains only three sugars and a substituent in the polysaccharide repeating unit. The conformation of the title disaccharide is described by the glycosidic torsion angles [varphi]H = 51.1 (1)° and [psi]H = 25.8 (1)°. In the crystal, a number of O-H...O hydrogen bonds link the methyl glycoside and water molecules, forming a three-dimensional network. One water molecule is disordered over two positions with occupancies of 0.748 (4) and 0.252 (4).

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