Mononuclear η⁶‐Arene Complexes of Lanthanides: One‐Step Syntheses, Crystal Structures, and Arene Exchange

Abstract

Gallium(III) halides react with cerium(III), ytterbium(III), or dysprosium(III) halides in the presence of alkylated benzenes yielding mononuclear complexes of the general formula [Ln(η6‐arene)(GaX4)3]. The X‐ray structures of [Ce(C6H5Me)(GaCl4)3] (1), [Ce(p‐C6H4Me2)(GaCl4)3]·0.5(p‐C6H4Me2) (2), [Yb(C6H5Me)(GaCl4)3] (3), [Yb(p‐C6H4Me2)(GaCl4)3]·0.5(p‐C6H4Me2) (4), and [Dy(C6H5Me)(GaBr4)3] (5) were determined. Arene ligands in the cerium–toluene compound 1 can be substituted by polycyclic aromatic hydrocarbons (PAHs); the compounds [Ce(naphthalene)(GaCl4)3] (6) and [Ce(pyrene)(GaCl4)3]·0.5(pyrene) (7) have been isolated and structurally characterized. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)

[(η5-C5Me5)Ru]+ fragments ligated to polyaromatic hydrocarbons: an experimental and computational approach to pathways for haptotropic migration

“…In particular, isomers 1A and 2A are found to be the global minima of 1 and 2, respectively, also in agreement with X-ray structures of related species. 3g,15j, 21,27,[35][36][37][38] On the other hand, isomers 3A and 3B are found to be nearly isoenergetic (Table 1), in agreement with the fact that both isomers were isolated in the solid state although only the major isomeric product 3A produced suitable X-ray quality single crystals. Contrary to what has been observed in the acenaphthylene series, 37,38 no structure of a fluoranthene complex η 5 -coordinated through its five-membered ring to a metal center has been reported to date.…”

Study of [Dy(η6-p-xylene)(GaCl4)3]-incorporated polyhedral silica nanofoam

“…In order to acknowledge that the complex is attached to the walls, elemental analysis was performed. During these experiments the samples were prepared while exposed to air, and as a consequence the ratio of dysprosium and gallium was changed to nearly 1:1, as expected [22]. Elemental mapping (Figs.…”

“…The dysprosium complex (DyC) was prepared essentially following a method reported before [22]. Briefly summarized: all sample preparations were performed in a glove box under protective atmosphere of deoxygenated and dried nitrogen (H 2 O < 1 ppm).…”

Hexa-μ-chlorido-hexachlorido(η6-hexamethylbenzene)trialuminium(III)lanthanum(III) benzene solvate

“…For a recent review of other lanthanide chloroaluminate complexes, see: Bochkarev (2002). For complexes of lanthanide chlorogallates with polycyclic aromatic systems, see: Gorlov et al (2008).…”