三价镧系元素和二价碱土金属氯化物的半乳糖醇配合物的晶体结构和光谱表征

Crystal structures and spectroscopic characterization of galactitol complexes of trivalent lanthanide and divalent alkaline earth chlorides.

作者信息

Su Yunlan, Yang Limin, Wang Zheming, Jin Xianglin, Weng Shifu, Yan Chunhua, Yu Zhiwu, Wu Jinguang

机构信息

Bioorganic Phosphorous Chemistry and Chemical Biology Laboratory of Educational Ministry, Department of Chemistry, Tsinghua University, Beijing 100084, China.

出版信息

Carbohydr Res. 2006 Jan 16;341(1):75-83. doi: 10.1016/j.carres.2005.07.025. Epub 2005 Nov 17.

DOI:10.1016/j.carres.2005.07.025

PMID:16297898

Abstract

Crystal structures and FT-IR spectra of metal ion-galactitol (C6H14O6, the ligand here abbreviated as L) complexes: 2LaCl3C6H14O610H2O and SrCl2C6H14O6 complexes are reported. Crystal data of lanthanide chlorides (La3+, Nd3+, Sm3+, Eu3+, Tb3+)-galactitol complexes and alkaline earth chlorides (Ca2+, Sr2+)-galactitol complexes published earlier are summarized. Unlike other lanthanide ion-galactitol complexes (2MCl3C6H14O614H2O), lanthanum ions give rise to two different structures: LaCl3C6H14O66H2O (LaL1) and 2LaCl3C6H14O610H2O (LaL2). Sr2+-galactitol complexes also crystallized with two structures: SrCl2C6H14O64H2O (SrL1) and SrCl2C6H14O6 (SrL2). These metal ions thus give different coordination structures with galactitol. The crystal structures and FT-IR spectra of lanthanide ion and alkaline earth ion-galactitol complexes were integrated to interpret the coordination modes of different metal ions. Similar IR spectra demonstrate the same coordination modes of the complexes.

摘要

金属离子-半乳糖醇（C6H14O6，此处配体简称为L）配合物的晶体结构和傅里叶变换红外光谱：报道了2LaCl3·C6H14O6·10H2O和SrCl2·C6H14O6配合物。总结了早期发表的镧系氯化物（La3+、Nd3+、Sm3+、Eu3+、Tb3+）-半乳糖醇配合物和碱土金属氯化物（Ca2+、Sr2+）-半乳糖醇配合物的晶体数据。与其他镧系离子-半乳糖醇配合物（2MCl3·C6H14O6·14H2O）不同，镧离子产生两种不同的结构：LaCl3·C6H14O6·6H2O（LaL1）和2LaCl3·C6H14O6·10H2O（LaL2）。Sr2+-半乳糖醇配合物也以两种结构结晶：SrCl2·C6H14O6·4H2O（SrL1）和SrCl2·C6H14O6（SrL2）。因此，这些金属离子与半乳糖醇形成不同的配位结构。整合了镧系离子和碱土金属离子-半乳糖醇配合物的晶体结构和傅里叶变换红外光谱，以解释不同金属离子的配位模式。相似的红外光谱表明配合物具有相同的配位模式。