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A Dimeric NHC–Silicon Monotelluride: Synthesis, Isomerization, and Reactivity
17
Citations
32
References
2017
Year
The reaction of the NHC-disilicon(0) complex [(I<sub>Ar</sub> )Si=Si(I<sub>Ar</sub> )] (1, I<sub>Ar</sub> =:C{N(Ar)C(H)}<sub>2</sub> , Ar=2,6-iPr<sub>2</sub> C<sub>6</sub> H<sub>3</sub> ) with two equiv of elemental Te in toluene at room temperature for three days afforded a mixture of the first dimeric NHC-silicon monotelluride [(I<sub>Ar</sub> )Si=Te]<sub>2</sub> (2) and its isomeric complex [(I<sub>Ar</sub> )Si(μ-Te)Si(I<sub>Ar</sub> )=Te] (3). When the same reaction was performed for ten days, only 3 was isolated from the reaction mixture. Compound 1 reacted with four equiv of elemental Te in toluene for four weeks, which proceeded through the formation of 2, 3 and the NHC-disilicon tritelluride complex [{(I<sub>Ar</sub> )Si(=Te)}<sub>2</sub> Te] (5-Te), to form the dimeric NHC-silicon ditelluride [(I<sub>Ar</sub> )Si(=Te)(μ-Te)]<sub>2</sub> (4). The reactions are in line with theoretical mechanistic studies for the formation of 4. Compound 3 reacted with one equiv of elemental sulfur in toluene to form the first NHC-disilicon sulfur ditelluride complex [{(I<sub>Ar</sub> )Si(=Te)}<sub>2</sub> S] (5-S).
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