Reactivity of Ar‘GeGeAr‘ (Ar‘ = C<sub>6</sub>H<sub>3</sub>-2,6-Dipp<sub>2</sub>, Dipp = C<sub>6</sub>H<sub>3</sub>-2,6-<i>i</i>Pr<sub>2</sub>) toward Alkynes: Isolation of a Stable Digermacyclobutadiene
作者:Chunming Cui、Marilyn M. Olmstead、Philip P. Power
DOI:10.1021/ja0318481
日期:2004.4.28
The first reactions of the "digermyne" Ar'GeGeAr' (1, Ar' = C6H3-2,6-Dipp2, Dipp = C6H3-2,6-iPr2) with alkynes are reported. 1 reacts with 1 equiv of H5C6CCC6H5 to afford the 1,2-digermacyclobutadiene 2 in high yield, while it reacts with 2 equiv of the less hindered alkyne Me3SiCCH to yield an unexpected bicyclic compound 3. Molecular structures of 2 and 3 were determined by X-ray crystallography. A possible mechanism for the formation of 3 is discussed. The high reactivity of 1, even at room temperature, emphasizes the fundamental differences between the GeGe and CC multiple bonds.