ALPHA,ALPHA-ALLO-TREHALOSE TRIHYDRATE

被引:6
作者
LINDEN, A [1 ]
LEE, CK [1 ]
机构
[1] NATL UNIV SINGAPORE,DEPT CHEM,SINGAPORE 0511,SINGAPORE
关键词
D O I
10.1107/S0108270194012102
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The low-temperature X-ray structure of alpha,alpha-allo-trehalose trihydrate (alpha-D-allopyranosyl alpha-D-allopyranoside trihydrate, C12H22O11.3H(2)O) is reported. There are two conformationally similar, but symmetry-independent sugar molecules plus six water molecules in the asymmetric unit. The sugar molecules lack internal crystallographic symmetry because of the relative conformations of the hydroxymethyl substituents and the torsion angles about the glycosidic linkage. The pyranose rings have slightly distorted C-4(1) conformations. The sugar and water molecules are linked by many hydrogen bonds to form a complex three-dimensional network. The intramolecular O ... O contact distances are larger than those reported in a calcium complex of alpha,alpha-allo-trehalose.
引用
收藏
页码:1007 / 1012
页数:6
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