Acta Cryst. (2005). E61, o860-o862  [ doi:10.1107/S1600536805006227 ]

Amygdalin trihydrate

L. Eriksson and G. Widmalm

Abstract: Extensive hydrogen bonding is present in the crystal structure of the title compound [systematic name: (R)-1-cyano-1-(phenylmethyl)--D-glucopyranosyl-(16)--D-glucopyranoside], C₂₀H₂₇NO₁₁·3H₂O, involving all of the hydroxy groups. The water molecules are also involved in the hydrogen bonding; in particular, one of them acts as a bridge between the endocyclic O atoms of the two sugar residues. The overall conformation of the disaccharide is described by the exo-anomeric conformations, ''_H = 26° and '_H = 38°, together with an antiperiplanar extended conformation of the constituent sugar residues, with '' = 155°.

Online 4 March 2005

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