1-(2,3-Di-O-acetyl-4-chloro-4-deoxy-6-O-tosyl-β-d-galactopyranosyl)propan-2-one methanol 0.25-solvate
The asymmetric unit of the title solvate, C20H25ClO9S·0.25CH3OH, contains one galactopyranosyl derivative and one-quarter of a methanol solvent molecule. The galactopyranose ring is in the usual 4C1 conformation, and the anomeric center of the sugar has a β configuration. The value...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
International Union of Crystallography
2008-08-01
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| Series: | Acta Crystallographica Section E |
| Online Access: | http://scripts.iucr.org/cgi-bin/paper?S1600536808022253 |
| Summary: | The asymmetric unit of the title solvate, C20H25ClO9S·0.25CH3OH, contains one galactopyranosyl derivative and one-quarter of a methanol solvent molecule. The galactopyranose ring is in the usual 4C1 conformation, and the anomeric center of the sugar has a β configuration. The value of θ (3.44°) and the range of torsion angles [or 53.1 (5)–63.0 (5)°] reflect a slight distortion of the 4C1 pyranose ring. A minor orientational disorder affects a carbonyl group, which was modeled with two sites for the O atom having occupancies of 0.79 (5) and 0.21 (5). The crystal studied exhibited inversion twinning. |
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| ISSN: | 1600-5368 |