24968-41-0Relevant academic research and scientific papers
Organoaluminum-assisted formation of rare-earth metal imide complexes
Schaedle, Dorothea,Schaedle, Christoph,Toernroos, Karl W.,Anwander, Reiner
, p. 5101 - 5107 (2012)
The μ2-imide complexes [Ln(AlMe4) (μ2-Nmes*)]x (mes* = C6H 2tBu3-2,4,6) (Ln = Y, La, Nd, Lu) are synthesized from homoleptic heterobimetallic complexes Ln(AlMe4)3 utilizing two distinct protocols: reaction with 2,4,6-tri-tert-butylaniline in hexane via methane elimination or with potassium (2,4,6-tri-tert-butylphenyl)amide in toluene according to a salt metathesis-protonolysis tandem reaction. Complexes [Ln(AlMe4)(μ2-Nmes*)]2 (Ln = Y, Nd, Lu) revealed isomorphous solid-state structures, featuring an asymmetrically bridged Ln2N2 core with very short Ln-N distances (2.071(1)-2.155(3) A). In the solid-state structure of the lanthanum derivative similar dimeric subunits assemble as La4Al4 oligomers through μ2-η1:η2-bridging tetramethylaluminato moieties. [La(AlMe4)(μ2- Nmes*)]4 displays La - -arene interactions (2.702(6) A) that are considerably shorter than the La(μ-CH3) aluminato bond lengths.
