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Scandium Reduced Arene Complex: Protonation and Reaction with Azobenzene by Priyabrata Ghana; Thomas P. Spaniol; Jun Okuda is a Chemistry article available to read on EtoBox.

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## Abstract The reactivity of the reduced anthracene complex of scandium [Li(thf)~3~][Sc{N(tBu)Xy}~2~(anth)] (2‐anth‐Li) (Xy=3,5‐Me~2~C~6~H~3~; anth=C~14~H~10~^2−^, thf=tetrahydrofuran) toward Brønsted acid [NEt~3~H][BPh~4~] and azobenzene is reported. While a stepwise protonation of 2‐anth‐Li with two equivalents of [NEt~3~H][BPh~4~] afforded the scandium cation [Sc{N(tBu)Xy}~2~(thf)~2~][BPh~4~] (3), reduction of azobenzene gave a thermolabile, anionic scandium reduced azobenzene complex [Li(thf)][Sc{N(tBu)Xy}~2~(η^2^‐PhNNPh)] (4), which slowly lost one of the anilide ligands to form the neutral scandium azobenzene complex dimer [Sc{N(tBu)Xy}(μ‐η^2^:η^2^‐Ph~2~N~2~)]~2~ (5). Exposure of 3 to CO~2~ produced the scandium carbamate complex [Sc{κ^2^‐O~2~CN(tBu)(Xy)}~2~][BPh~4~] (6) as a result of CO~2~ insertion into the Sc−N bonds. In an attempt to prepare scandium hydrides, the reaction of 3 with the hydride sources LiAlH~4~ and Na[BEt~3~H] led to the terminal aluminum hydride [AlH{N(tBu)Xy}~2~(thf)] (7) and the scandium n‐butoxide [Sc{N(tBu)(Xy)}~2~(μ‐OnBu)] (8) after Sc/Al transmetalation and nucleophilic ring‐opening of THF, respectively. All reported compounds isolated in moderat

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Author

Priyabrata Ghana; Thomas P. Spaniol; Jun Okuda

Publisher

Wiley

Published

2021

Language

EN

Field

Chemistry (Physical Sciences)