STRUCTURE OF PRECURSORS OF HIGHER-CARBON SUGARS

被引:2
作者
CIUNIK, Z [1 ]
JAROSZ, S [1 ]
机构
[1] POLISH ACAD SCI,INST ORGAN CHEM,PL-01224 WARSAW,POLAND
来源
ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE | 1993年 / 49卷
关键词
D O I
10.1107/S0108768192005391
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
3-O-Benzyl-5-C-(1,2:3,4-di-O-isopropylidene-alpha-D-galacto-heptopyranos-6-ulos-7-ylidene)-5-deoxy- 1,2-O-isopropylidene-alpha-D-xylofuranose (2), C28H36O10, M(r) = 532.59, monoclinic, P2(1), a = 14.233 (2), b = 9.271(1), c = 11.804 (2) angstrom, beta = 114.53(1)-degrees, V = 1417.0 (4) angstrom3, Z = 2, D(x) = 1.248 (1) Mg M-3, lambda(Cu Kalpha) = 1.5418 angstrom, mu = 0.797 mm-1, F(000) = 568, room temperature, R = 0.0472 for 1960 reflections with F > 6sigma(F). 3-O-Benzyl-6-C-(1,2:3,4-di-O-isopropylidine-D-glycero-alpha-D-galacto-hexopyranos-6-yl)-1,2-O-isopropylidene-D-glycero-beta-L-ido-hexofuranose (3), C28H40O12, M(r) = 568.62, orthorhombic, P2(1)2(1)2(1), a = 8.912 (1), b = 10. 1 54 (2), c = 32.704 (5) angstrom, V = 2959.5 (8) angstrom3, Z = 4, D(x) = 1.276 (1) Mg m-3, lambda(Cu Kalpha) = 1.5418 angstrom, mu = 0.747 mm-1, F(000) = 1216, room temperature, R = 0.0375 for 2226 reflections with F > 6simga(F). In (2) the results of crystal structure investigations and molecular mechanics calculations suggest some rotational flexibility of bonds linking the two sugar moieties with the three-carbon chain. In (3) a network of intra- and intermolecular O-H ... O hydrogen bonds exists.
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页码:101 / 107
页数:7
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