916648-99-2Relevant academic research and scientific papers
Ligand design for the assembly of polynuclear complexes: Syntheses and structures of trinuclear and tetranuclear aluminum alkyl complexes bearing tripodal diamidoselenophosphinito ligands and a comparison to related tripodal triamidophosphine complexes
Han, Hua,Johnson, Samuel A.
, p. 5594 - 5602 (2008/10/09)
Reactions of the triaminophosphines P(CH2NHArR) 3 (1a-c, where ArR = 3,5-(CF3) 2C6H3 for a; ArR = Ph for b, Ar R = 3,5-Me2C6H3 for c) with selenium afford the triaminophosphine selenides Se=P(CH2-NHAr R)3 (2a-c). The phosphine selenides 2a-c react with 4 equiv of AlMe3 at room temperature to generate the triangular trinuclear aluminum complexes [P(CH2NArR) 2Se](AlMe2)3 (3a-c). The byproduct of the formation of 3a was hydrolyzed and provided CH3CH2N(H)-3, 5-(CF3)2C6H3. When 2a-c are treated with excess AlMe3, the corresponding tetranuclear Lewis acid-base adducts Me3Al·[P(CH2NArR) 2Se]-(AlMe2)3 (4b,c) are isolated. The reaction of P(CH2NHArR)3 (1a-c) with 2 equiv of AlMe3 produces the dinuclear aluminum complexes P(CH 2NArR)3Al2Me3 (5a-c). When 1b,c are reacted with excess AlMe3, the Lewis acid-base adducts Me3Al·P(CH2NArR)3Al 2Me3 (6b,c) are isolated. Solid-state molecular structures were determined for complexes 2a, 2b, 2c, 3a, 3c, 4b, 5a, and 6b by X-ray crystallography.
