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

Abstract

In the title compound, [Al3LaCl12(C12H18)]·C6H6, all mol­ecules are located on a mirror plane. Three chloridoaluminate groups and a hexa­methyl­benzene mol­ecule are bound to the central lanthanum(III) ion, forming a distorted penta­gonal bipyramid with the η6-coordinated arene located at the apical position. The hexa­methyl­benzene ligand disordered between two orientations in a 1:1 ratio is also involved in parallel-slipped π–π stacking inter­molecular inter­actions with a benzene solvent mol­ecule [centroid–centroid distance 3.612 (4) Å].

Crystal structure of bis(μ2-methanolato-κO:κO)hexamethylbis(μ2-triphenylacetato-κO:κO′)bis(μ2-triphenylacetato-κ2 O,O′:κO)dialuminiumdilanthanum toluene tetrasolvate

“…Crystal structures of lanthanide(III) compounds having an 6 -coordinated uncharged arene system have become numerous over the last two decades, resulting in the description of over 150 crystal structures (see the CSD). Ten structures of such La(III) -complexes are known: EZIPIM (Giesbrecht et al, 2004), MALXOM (Deacon et al, 2000), POKCAU (Gerber et al, 2008), RILBIZ, RILBUL (Hamidi et al, 2013), ROMQUG (Filatov et al, 2009), SOJHAB, SOJHEF, SOJHIJ (Filatov et al, 2008), ZIDSOV (Butcher et al, 1995). Crystallographic data for these complexes were used to compare structural parameters of the title compound in the Structural Commentary section.…”

Topology-Dependent Synthesis, Structures, and Bonding Interactions of Uranium Polyarene Complexes

“…3.4 and 3.3 Å for 8 and 11, respectively, which is best described as a slipped π−π stacking. 131 anions, 32 no intermolecular π•••π interaction 132 has previously been identified in them. We consider that the localization of negative charges at the bound ring reduces the intermolecular Pauli repulsion between the nonbound rings, which renders it favorable to adopt a face-to-face stacked orientation.…”

“…However, such intermolecular π···π interaction is absent in 6 and 10 , which may account for the different crystallinities of the NN TBS and NN TIPS -supported uranium polyarene complexes. Notably, while various intermolecular interactions, including cation···π and C–H···π interactions, are known for metal complexes of polyarene anions, no intermolecular π···π interaction has previously been identified in them. We consider that the localization of negative charges at the bound ring reduces the intermolecular Pauli repulsion between the nonbound rings, which renders it favorable to adopt a face-to-face stacked orientation …”

η6‐Arene(halogenidoaluminato)lanthanoid(III) Complexes: Synthesis, Characterization and Catalytic Activity for Isoprene Polymerization

“…The LnÀ C bond lengths of 1-4 and 6, 7, 9, 10 and their Ln-Centroid distances generally correspond well with the corresponding reported values for [Ln(η 6 -arene)(AlCl 4 ) 3 ] complexes. [7][8][9]12,17,19] On the other hand the arene bonding in 4 and 10 is much weaker than that in the zerovalent [Gd(1,3,5-tBu 3 C 6 H 3 ] where GdÀ C is 2.585-2.660 Å and Gd-centroid is 2.219 Å. [24] The decrease in LnÀ C bond lengths (or Ln-Centroid distances) from 1-4 and from 6, 7, 9, 10 (La!…”