Syntheses and Characterization of Tantalum Alkyl Imides and Amide Imides. DFT Studies of Unusual α‑SiMe<sub>3</sub> Abstraction by an Amide Ligand
- Seth C. Hunter (1450792)
- Shu-Jian Chen (1450798)
- Carlos A. Steren (1450795)
- Michael G. Richmond (1316970)
- Zi-Ling Xue (1414108)
DOIAbstract
Reaction of TaCl<sub>2</sub>(NSiMe<sub>3</sub>)[N(SiMe<sub>3</sub>)<sub>2</sub>] (<b>1</b>) with alkylating reagents form the alkyl amide imide complexes TaR<sub>2</sub>(NSiMe<sub>3</sub>)[N(SiMe<sub>3</sub>)<sub>2</sub>] (R = Me (<b>2</b>), CH<sub>2</sub>Ph (<b>3</b>)) and mixed amide imide compounds Ta(NR′<sub>2</sub>)<sub>2</sub>(NSiMe<sub>3</sub>)[N(SiMe<sub>3</sub>)<sub>2</sub>] (R′ = Me (<b>4</b>), Et (<b>5</b>)). The reaction of <b>2</b> and 0.5 equiv of O<sub>2</sub> leads to preferential oxygen insertion into one Ta–Me bond, yielding the alkoxy-bridged alkyl dimer Ta<sub>2</sub>(μ-OMe)<sub>2</sub>Me<sub>2</sub>(NSiMe<sub>3</sub>)<sub>2</sub>[N(SiMe<sub>3</sub>)<sub>2</sub>]<sub>2</sub> (<b>6</b>) as cis and trans isomer...
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