Yttrium Anilido Hydride: Synthesis, Structure, and Reactivity
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Abstract
The synthesis, structure, and reactivity of the yttrium anilido hydride [LY(NH(DIPP))(μ-H)]<sub>2</sub> (<b>3</b>; L = [MeC(N(DIPP))CHC(Me)(NCH<sub>2</sub>CH<sub>2</sub>NMe<sub>2</sub>)]<sup>−</sup>, DIPP = 2,6-<sup><i>i</i></sup>Pr<sub>2</sub>C<sub>6</sub>H<sub>3</sub>)) are reported. The protonolysis reaction of the yttrium dialkyl [LY(CH<sub>2</sub>SiMe<sub>3</sub>)<sub>2</sub>] (<b>1</b>) with 1 equiv of 2,6-diisopropylaniline gave the yttrium anilido alkyl [LY(NH(DIPP))(CH<sub>2</sub>SiMe<sub>3</sub>)] (<b>2</b>), and a subsequent σ-bond metathesis reaction of <b>2</b> with 1 equiv of PhSiH<sub>3</sub> offered the yttrium anilido hydride <b>3</b>. The structure of <b>3</b> was characterized by X-ray crystallography, which showed that the complex is a μ-H dimer. <b>3</b> shows high reactivity toward a variety of unsaturated substrates, including imine, azobenzene, carbodiimide, isocyanide, ketone, and Mo(CO)<sub>6</sub>, giving some structurally intriguing products
