Crystal structure of bis(μ2-methanolato-κO:κO)hexamethylbis(μ2-triphenylacetato-κO:κO′)bis(μ2-triphenylacetato-κ2O,O′:κO)dialuminiumdilanthanum toluene tetrasolvate

Acta Crystallographica Section E: Crystallographic Communications

Konstantin A. Lyssenko¹  Ilya E. Nifant'ev²  Alexander A. Vinogradov²  Dmitrii M. Roitershtein²  Mikhail E. Minyaev² 

[1] A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilova Str., 119991, Moscow, Russian Federation;A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, 29 Leninsky Prospect, 119991, Moscow, Russian Federation;

关键词: lanthanum;    aluminium;    triphenylacetate;    π-complex;    coordination compound;    crystal structure;   

DOI  :  10.1107/S2056989018015876

来源: DOAJ

【 摘 要 】

The title compound, [Al2La2(C20H15O2)4(CH3)6(CH3O)2]·4CH3C6H5 or [{La(Ph3CCOO)2(Me3AlOMe)}2]·4CH3C6H5, was formed in a reaction between lanthanum tris(tetramethylaluminate) and triphenylacetic acid (1:1) with unintended partial oxidation. The triphenylacetate ligand exhibits μ2-κ1O:κ1O′ bridging and μ2-κ2O,O′:κ1O semi-bridging coordination modes, forming a dimeric La2(μ-OCO)4 core. The semi-bridging triphenylacetate group provides additional bonding with an La3+ cation via the π-system of one of its phenyl rings. The trimethylmethoxyaluminate anion, which is coordinated to the La3+ cation by its O atom, displays a rather long La—CMe bond. Two toluene molecules are each disordered over two orientations about centres of symmetry with site occupancy factors of 0.5. The title compound represents the first example of an LnIII complex containing both alkyl alkoxide aluminate and π-bounded arene fragments.

【 授权许可】

Unknown