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  • Comprehensive structural study of lanthanide(III) chloride hydrates: [ RE Cl 3 · x H 2 O ( RE = La–Nd, Sm–Lu; x = 6, 7)]
Title: Comprehensive structural study of lanthanide(III) chloride hydrates: [ RE Cl 3 · x H 2 O ( RE = La–Nd, Sm–Lu; x = 6, 7)]
A comprehensive crystallographic study is presented of the complete series of rare-earth(III) chloride hydrates. Early lanthanides form dimeric [(H2O)7RE(μ-Cl)2RE(H2O)7]4+binuclear complexes in which eachREatom (RE= La3+, Ce3+) is coordinated by seven H2O molecules and two bridging inner-sphere chloride ions. Di-μ-chlorido-bis[heptaaqualanthanide(III)] tetrachloride, [(H2O)7RE(μ-Cl)2RE(H2O)7]Cl4, crystallizes in the triclinic space groupP1. Heavier lanthanides exhibit monomeric [RECl2(H2O)6]+units where eachREatom (RE= Pr3+, Nd3+, Sm3+–Lu3+) is coordinated by six H2O molecules and two inner-sphere chloride ions. Hexaaquadichloridolanthanide(III) chlorides, [RECl2(H2O)6]Cl, adopt the monoclinic space groupP2/c.In both structures, the cationicinner-spherecomplex is counter-charged by the corresponding number ofouter-sphereCl−anions, in which the metal ion and outer-sphere chloride ion lie on crystallographic twofold axes. Crystal structures for all compounds were determined in high quality with refined H-atom positions and were collected at the same temperature (100 K), providing a uniform structural dataset and addressing discrepancies in previous reports. The crystal structure of [HoCl2(H2O)6]Cl is reported for the first time.  more » « less
Award ID(s):
2215262
PAR ID:
10670696
Author(s) / Creator(s):
; ;
Publisher / Repository:
IUCr
Date Published:
Journal Name:
Acta Crystallographica Section E Crystallographic Communications
Volume:
80
Issue:
12
ISSN:
2056-9890
Page Range / eLocation ID:
1342-1349
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
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