Methyl α-l-rhamnosyl-(1→2)[α-l-rhamnosyl-(1→3)]-α-l-rhamnoside pentahydrate: synchrotron study
2012 (English)In: Acta Crystallographica Section E: Structure Reports Online, ISSN 1600-5368, E-ISSN 1600-5368, Vol. 68, no 7, o2221-o2222 p.Article in journal (Refereed) Published
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 ϕ2 = 48 (1)°, ψ2 = −29 (1)°, ϕ3 = 44 (1)° and ψ3 = 4 (1)°, whereas the ψ2 torsion angle represents a conformation from the major state in solution, the ψ3 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—HO hydrogen bonding is present in the crystal and a water-containing channel is formed along the b-axis direction.
Place, publisher, year, edition, pages
2012. Vol. 68, no 7, o2221-o2222 p.
IdentifiersURN: urn:nbn:se:su:diva-85913DOI: 10.1107/S1600536812027390OAI: oai:DiVA.org:su-85913DiVA: diva2:585428
FunderSwedish Research Council