Abstract
In the title compound, [Al(3)LaCl(12)(C(12)H(18))]·C(6)H(6), all mol-ecules are located on a mirror plane. Three chloridoaluminate groups and a hexa-methyl-benzene mol-ecule are bound to the central lanthanum(III) ion, forming a distorted penta-gonal bipyramid with the η(6)-coordinated arene located at the apical position. The hexa-methyl-benzene ligand disordered between two orientations in a 1:1 ratio is also involved in parallel-slipped π-π stacking inter-molecular inter-actions with a benzene solvent mol-ecule [centroid-centroid distance 3.612 (4) Å].