一水合物形式的三糖松二糖的晶体和分子结构。
The crystal and molecular structure of the trisaccharide erlose as the monohydrate.
作者信息
Taga T, Inagaki E, Fujimori Y, Nakamura S
机构信息
Faculty of Pharmaceutical Sciences, Kyoto University, Japan.
出版信息
Carbohydr Res. 1993 Feb 24;240:39-45. doi: 10.1016/0008-6215(93)84169-7.
Erlose [O-beta-D-fructofuranosyl-(1-->2)-O-alpha-D-glucopyranosyl-(1-->4)- alpha-D-glucopyranoside] monohydrate, C18H32O16.H2O, M(r) = 522.45, is orthorhombic, P2(1)2(1)2(1) with a = 30.748 (3), b = 8.757 (1), c = 8.270 (1) A, and Z = 4. The structure was solved by direct methods, and refined to R = 0.048 for 1909 observed reflections. The torsion angles about the (1-->2) and (1-->4) glycosidic bonds are similar to those observed in other sucrose- and maltose-like oligosaccharides. The maltose moiety has an O-3'-H...O-2 intramolecular hydrogen-bond, but the sucrose moiety has no intramolecular hydrogen bonds. The hydrogen bonding in the crystal includes infinite and finite chains crosslinked by the water molecule.
水合埃尔洛糖[O-β-D-呋喃果糖基-(1→2)-O-α-D-吡喃葡萄糖基-(1→4)-α-D-吡喃葡萄糖苷]，C18H32O16·H2O，Mr = 522.45，呈正交晶系，空间群为P2(1)2(1)2(1)，a = 30.748(3) Å，b = 8.757(1) Å，c = 8.270(1) Å，Z = 4。结构通过直接法解析，对1909个观测反射进行精修后R = 0.048。(1→2)和(1→4)糖苷键周围的扭转角与其他蔗糖和麦芽糖样寡糖中观测到的扭转角相似。麦芽糖部分有一个O-3'-H...O-2分子内氢键，但蔗糖部分没有分子内氢键。晶体中的氢键包括由水分子交联的无限和有限链。
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