Seven-Membered Cyclic Diamidoalumanyls of Heavier Alkali Metals: Structures and C-H Activation of Arenes.

ABSTRACT: Like the previously reported potassium-based system, rubidium and cesium reduction of [{SiN^Dipp}AlI] ({SiN^Dipp} = {CH₂SiMe₂NDipp}₂) with the heavier alkali metals [M = Rb and Cs] provides dimeric group 1 alumanyl derivatives, [{SiN^Dipp}AlM]₂. In contrast, similar treatment with sodium results in over-reduction and incorporation of a formal equivalent of [{SiN^Dipp}Na₂] into the resultant sodium alumanyl species. The dimeric K, Rb, and Cs compounds display a variable efficacy toward the C-H oxidative addition of arene C-H bonds at elevated temperatures (Cs > Rb > K, 110 °C) to yield (hydrido)(organo)aluminate species. Consistent with the synthetic experimental observations, computational (DFT)

SUBMITTER: Liu HY 

PROVIDER: S-EPMC10565898 | biostudies-literature | 2023 Oct

REPOSITORIES: biostudies-literature