Methyl α-l-rhamnosyl-(1→2)[α-l-rhamnosyl-(1→3)]-α-l-rhamnoside penta­hydrate: synchrotron study

Methyl α-l-rhamnosyl-(1→2)[α-l-rhamnosyl-(1→3)]-α-l-rhamnoside pentahydrate: synchrotron study

Eriksson, Lars (author)

Widmalm, Göran (author): Stockholms universitet,Institutionen för organisk kemi

(creator_code:org_t)

Related links:: https://doi.org/10.1...; show more...; https://urn.kb.se/re...; https://doi.org/10.1...; show less...

Abstract Subject headings

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.

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Chemical Science ...; and Organic Chemistr ...

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