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Methyl α-l-rhamnosyl-(1→2)[α-l-rhamnosyl-(1→3)]-α-l-rhamnoside penta­hydrate: synchrotron study
Stockholm University, Faculty of Science, Department of Organic Chemistry.
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
Abstract [en]

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.
National Category
Organic Chemistry
URN: urn:nbn:se:su:diva-85913DOI: 10.1107/S1600536812027390OAI: diva2:585428
Swedish Research Council
Available from: 2013-01-10 Created: 2013-01-10 Last updated: 2013-01-10Bibliographically approved

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Eriksson, LarsWidmalm, Göran
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