Structure analysis by reduced data. II. Increase of reproducibility of the results of diffraction studies
β Scribed by A. P. Dudka; A. A. Loshmanov
- Book ID
- 110128655
- Publisher
- SP MAIK Nauka/Interperiodica
- Year
- 2001
- Tongue
- English
- Weight
- 81 KB
- Volume
- 46
- Category
- Article
- ISSN
- 1063-7745
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π SIMILAR VOLUMES
The preferred conformation of the acetoxyphenyl fragment shows a planar acetoxy (AcO) group perpendicular to the Ph ring. Steric hindrance strongly limits and affects rotation about the C-OCOCH, bond: if the AcO group twists away from its perpendicular conformation, the carbonyl oxygen moves to keep
In a large sample of observed methoxyphenyl groups, the twist angle 7 about the Me0 -Cph bond measuring internal rotation of the Me0 group shows a continuous distribution with maxima at 0" (coplanar conformation) and -90" (perpendicular conformation). The preferred conformation of methoxyphenyl depe
## Abstract A structural investigation of the marine algal polysaccharide polyβΞ±βLβguluronic acid is described. The molecular chains consist of 1 β 4 diaxially linked Lβguluronic acid residues in the 1C chair conformation and are stabilized in a twofold helix conformation by an intraβmolecular O(2)