%0 Journal Article
%T Methyl α-l-rhamnosyl-(1→2)[α-l-rhamnosyl-(1→3)]-α-l-rhamnoside pentahydrate: synchrotron study
%A Lars Eriksson
%A G&#246
%A ran Widmalm
%J Acta Crystallographica Section E
%D 2012
%I International Union of Crystallography
%R 10.1107/s1600536812027390
%X The title hydrate, C19H34O13¡¤5H2O, contains a vicinally disubstituted trisaccharide in which the two terminal rhamnosyl sugar groups are positioned adjacent to each other. The conformation of the trisaccharide is described by the glycosidic torsion angles  2 = 48 (1)¡ã, ¦×2 =  29 (1)¡ã,  3 = 44 (1)¡ã and ¦×3 = 4 (1)¡ã, whereas the ¦×2 torsion angle represents a conformation from the major state in solution, the ¦×3 torsion angle conformation may have been caught near a potential energy saddle-point when compared to its solution structure, in which at least two but probably three conformational states are populated. Extensive intermolecular O¡ªH...O hydrogen bonding is present in the crystal and a water-containing channel is formed along the b-axis direction.
%U http://scripts.iucr.org/cgi-bin/paper?S1600536812027390