A series of amidate ligand precursors of the type ([R'(NO)R]H were prepared on multi-gram scale in 74-86% yield. The specific ligands are ([tBu(NO)Ph]H (1 ), ([Ph(NO)tBu]H (2 ), ([tBu(NO)tBu]H (3 ), and ([tBu(NO)C6F5]H (4 ). All four ligands were characterized by 1H NMR spectroscopy. The coordination chemistry of the ligands to aluminum was investigated. A protonation pathway between the ([R'(NO)R]H amidate precursors and AlMe3 in a 1:1 ratio in refluxing hexane was used to prepare aluminum complexes of the type [R'(NO)R]AlMe2. Analogous [R'(NO)R]2AlMe and [R'(NO)R]3Al complexes were also prepared by changing the ligand:Al stoichiometry. The products were analyzed by 1H NMR and were characterized by X-ray diffraction. The catalytic activity of the [R'(NO)R]AlMe2, [R'(NO)R]2AlMe and [R'(NO)R]3Al complex was investigated.

Synthesis of a series of aluminum amidate complexes and their catalytic activity

244th National Meeting (2012)

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