The crystal and molecular structure of β-d-fructofuranosyl α-d-xylopyranoside hemihydrate
| Autor: | Eiji Inagaki, Tooru Taga, Kouki Fujita, Yoshihiro Fujimori, Kouzou Hara |
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| Rok vydání: | 1993 |
| Předmět: |
Models
Molecular chemistry.chemical_classification Sucrose Hydrogen bond Stereochemistry Molecular Sequence Data Organic Chemistry Ketose Disaccharide Hydrogen Bonding Glycosidic bond General Medicine Biochemistry Analytical Chemistry chemistry.chemical_compound Carbohydrate Sequence X-Ray Diffraction chemistry Intramolecular force Molecule Orthorhombic crystal system Hydrate |
| Zdroj: | Carbohydrate Research. 241:63-69 |
| ISSN: | 0008-6215 |
| DOI: | 10.1016/0008-6215(93)80095-v |
| Popis: | The crystal and molecular structure of β- d -fructofuranosyl α- d -xylopyranoside (xylosucrose) hemihydrate, C 11 H 20 O 10 ·0.5H 2 O, is orthorhombic, P 2 1 2 1 2, with a = 20.919(5), b = 18.727(2), c = 7.071(1) A, V = 2770.1(2) A 3 , Z = 8, and D x = 1.541 g·cm −3 . The structure was solved by direct methods and refined to R = 0.040 for 2564 observed reflections. Two independent xylosucrose molecules exist in the unit cell, and their conformations about the 1 → 2′ glycosidic bond are similar to sucrose. The orientations of the primary hydroxyl groups in the two molecules differ. An O-1′ ··· O-2 intramolecular hydrogen bond was observed in the one molecule, while an O-6′ ··· O-5 intramolecular hydrogen bond was observed in the other involving disorder of O-6′. |
| Databáze: | OpenAIRE |
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