Synthesis and Structural Similarities of Yttrium and Lanthanide Chloride Complexes with Diglyme and Tetrahydrofuran
Saša Petriček*
Faculty of Chemistry and Chemical Technology, Department of Inorganic
Chemistry, Aškerčeva 5, P.O.B. 537, SLO – 1001 Ljubljana, Slovenia
* Corresponding author: E-mail:
sasa.petricek@fkkt.uni-lj.si;
Fax.:+3861 2419 220
Abstract
Mononuclear molecular complexes, [YCl3(diglyme)(THF)] (1) and
[LuCl3(diglyme)(H2O)] (2), [ErBr3(diglyme)(H2O)]
(3), and binuclear molecular complexes [MCl3(diglyme)]2
(M = Y (4), Lu (5)) were synthesized by the reactions of
corresponding halide hydrates, (CH3)3SiX (X = Cl, Br) and
diethylen glycol dimethyl ether (diglyme) in tetrahydrofuran (THF). The complex
1 crystallized from a reaction solution, while the complexes 2,
3 and the binuclear complexes 4, 5 were obtained by
recrystallizations of reaction products from dichloromethane. The complexes 2
and 3 were obtained if some water was present during crystallization. The
central ions M (M = Y, Er, Lu) in the complexes 1–5 are seven-coordinate
in a distorted pentagonal bipyramidal fashion. Four oxygen atoms and three
halide ions are coordinated to the central ions in [MX3(diglyme)(L)]
(1, 2, 3), while two bridging and two nonbridging chloride ions and three
oxygen atoms are coordinated to yttrium or lutetium in [MCl3(diglyme)]2,
4 and 5, respectively. A reaction of HoCl3 · 6H2O
and (CH3)3SiCl in THF resulted in an ionic complex [HoCl2(THF)5][HoCl4(THF)2]
(6).
Keywords: Lanthanide chloride; Lanthanide bromide; Diglyme; Crystal structure; Binuclear complexes; Bridging chlorides