Reaction of [2-(SiH<sub>3</sub>)C<sub>6</sub>H<sub>4</sub>]<sub>2</sub>SiH<sub>2</sub> with Ni(Et<sub>2</sub>PCH<sub>2</sub>CH<sub>2</sub>PEt<sub>2</sub>)(PEt<sub>3</sub>)<sub>2</sub>: Characterization of η<sup>2</sup>-(Si−H)Ni and Ni<sup>IV</sup>−H Complexes
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The reaction of (2-SiH3C6H4)2SiH2 with Ni(Et2PCH2CH2PEt2)(PEt3)2 afforded a new silylnickel complex, which, in the solid state, was determined to be a bis(silyl)η2-(Si−H)nickel complex, the first example of η2-(Si−H)nickel complex by single-crystal X-ray analysis. Variable-temperature NMR spectroscopy revealed fluxional behavior of the complex in solution; at room temperature, exchange of five hydrogens (two SiH2 and one hydrogen bound to nickel) was observed, while at −80 °C the exchange of hydrogens appeared frozen to adopt a tris(silyl)(hydrido)nickel(IV) structure, which was confirmed by theoretical calculation. The latter complex is the first example of hydridonickel(IV) complex.
创建时间：
2004-07-07
