固态下D-核糖与三价镧系阳离子的络合作用。PrCl₃-α-D-吡喃核糖-5H₂O的晶体结构及傅里叶变换红外光谱研究。

Complexation of trivalent lanthanide cations by D-ribose in the solid state. The crystal structure and FT-IR study of PrCl3-alpha-D-ribopyranose-5H2O.

作者信息

Yang L, Zhao Y, Xu Y, Jin X, Weng S, Tian W, Wu J, Xu G

机构信息

The State Key Laboratory of Rare Earth Materials Chemistry and Applications, Peking University-The University of Hong Kong Joint Laboratory in Rare Earth Materials and Bioinorganic Chemistry, Peking University, 100871, Beijing, China.

出版信息

Carbohydr Res. 2001 Aug 23;334(2):91-5. doi: 10.1016/s0008-6215(01)00164-1.

DOI:10.1016/s0008-6215(01)00164-1

PMID:11502264

Abstract

The crystal structure of praseodymium chloride.alpha-D-ribopyranose pentahydrate, PrCl3-C5H10O5-5 H2O, M(r)=487.47, a=9.1989(8), b=8.8214(7), c=9.8233(9) A, beta=94.060(3) degrees, V=795.2(1) A(3), Z=2, mu=0.71073 A and R=0.0418 for 1923 observed reflections and 172 parameters has been determined. The sugar provides three hydroxyl groups, ax-eq-ax for coordination. The Pr(3+) ion is nine-coordinated with five Pr-O bonds from water molecules, three from hydroxyl groups and one from chloride. The OH, CO stretching vibrations and COH bending vibrations are shifted in the complex IR spectrum and the hydroxyl groups, water molecules, chloride ions form an extensive hydrogen-bond network.

摘要

氯化镨-α-D-吡喃核糖五水合物（PrCl₃·C₅H₁₀O₅·5H₂O）的晶体结构已被确定，其相对分子质量M(r)=487.47，晶胞参数a = 9.1989(8) Å，b = 8.8214(7) Å，c = 9.8233(9) Å，β = 94.060(3)°，晶胞体积V = 795.2(1) Å³，Z = 2，μ = 0.71073 Å，对于1923个观测反射和172个参数，R = 0.0418。糖提供三个羟基，以轴向-赤道-轴向方式配位。Pr(3+)离子为九配位，有五个来自水分子的Pr-O键、三个来自羟基的键和一个来自氯离子的键。在配合物的红外光谱中，OH、CO伸缩振动和COH弯曲振动发生了位移，羟基、水分子、氯离子形成了广泛的氢键网络。