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The crystal and molecular structure of the trisaccharide erlose trihydrate

✍ Scribed by Tooru Taga; Eiji Inagaki; Yoshihiro Fujimori; Satoshi Nakamura

Publisher: Elsevier Science
Year: 1994
Tongue: English
Weight: 606 KB
Volume: 251
Category: Article
ISSN: 0008-6215
DOI: 10.1016/0008-6215(94)84286-8

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✦ Synopsis

ABSTRACI Erlose [p-o-fructofuranosyl O-o-o-glucopyranosyl-(l + 4&o-glucopyranoside] trihydrate, r&Ha, 0,,.3HaO, M, = 558.48, is orthorhombic, P2,2,2, with a = 31.164(7), b = 13.111(5), c = 11.636(5) A, and Z = 8. The structure was solved by direct methods, and refined to R = 0.035 for 3926 observed reflections. The unit cell contains two independent molecules having a similar conformation. The conformation of the a-(1+ 2) glycosidic linkage is similar to that observed in erlose monohydrate, whereas the conformation of the ~(1 + 4) glycosidic linkage differs significantly. The molecule has no intramolecular hydrogen-bonds except for the minor components of three-center bonds, but indirect intramolecular hydrogen-bonds through the water molecules are formed. The hydrogen-bond system in the crystal structure consists of infinite and finite chains crosslinked by water molecules.

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