A Dimeric NHC-Silicon Monotelluride: Synthesis, Isomerization and Reactivity.

Author(s) So, C.W.; Chan, Y.C.; Leong, B.X.; Li, Y.; Yang, M.C.; Li, Y.; Der Su, M.
Journal Angew Chem Int Ed Engl
Date Published 2017 Jun 29

The reaction of the NHC-disilicon(0) complex [(IAr)Si=Si(IAr)] (1, IAr = :C{N(Ar)C(H)}2, Ar = 2,6-iPr2C6H3) with two equivalents of elemental tellurium in toluene at room temperature for three days afforded a mixture of the first dimeric NHC-silicon monotelluride [(IAr)Si=Te]2 (2) and its isomeric complex [(IAr)Si(μ-Te)Si(IAr)=Te] (3). When the same reaction was performed for ten days, only 3 was isolated from the reaction mixture. In addition, compound 1 reacted with four equivalents of elemental tellurium in toluene for four weeks, which proceeded through the formation of 2, 3 and the NHC-disilicon tritelluride complex [{(IAr)Si(=Te)}2Te] (5-Te), to form the dimeric NHC-silicon ditelluride [(IAr)Si(=Te)(μ-Te)]2 (4). The reactions are in line with theoretical mechanistic studies for the formation of 4. In addition, compound 3 reacted with one equivalent of elemental sulfur in toluene to form the first NHC-disilicon sulfur ditelluride complex [{(IAr)Si(=Te)}2S] (5-S).

DOI 10.1002/anie.201705168
ISSN 1521-3773
Citation Angew Chem Int Ed Engl. 2017.

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