Crystal structures and spectroscopic characterization of galactitol complexes of trivalent lanthanide and divalent alkaline earth chlorides.
Crystal structures and FT-IR spectra of metal ion-galactitol (C6H14O6, the ligand here abbreviated as L) complexes: 2LaCl3*C6H14O6*10H2O and SrCl2*C6H14O6 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 (2MCl3*C6H14O6*14H2O), lanthanum ions give rise to two different structures: LaCl3*C6H14O6*6H2O (LaL1) and 2LaCl3*C6H14O6*10H2O (LaL2). Sr2+-galactitol complexes also crystallized with two structures: SrCl2*C6H14O6*4H2O (SrL1) and SrCl2*C6H14O6 (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.
Su
Yunlan
Y
Bioorganic Phosphorous Chemistry and Chemical Biology Laboratory of Educational Ministry, Department of Chemistry, Tsinghua University, Beijing 100084, China.
Yang
Limin
L
Wang
Zheming
Z
Jin
Xianglin
X
Weng
Shifu
S
Yan
Chunhua
C
Yu
Zhiwu
Z
Wu
Jinguang
J
D003460:Crystallization; D018360:Crystallography, X-Ray / Q000379:methods; D004376:Galactitol / Q000737:chemistry*; D006860:Hydrogen Bonding; D007811:Lanthanum / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared / Q000379:methods*; D013324:Strontium / Q000737:chemistry*
C028521:lanthanum chloride; D004376:Galactitol; D007811:Lanthanum; C025700:strontium chloride; D013324:Strontium