A stable silagermene (<sup>t</sup>Bu<sub>3</sub>Si)<sub>2</sub>Si=Ge(mes)<sub>2</sub> (mes = 2,4,6‐trimethylphenyl): Synthesis, X‐ray crystal structure, and thermal isomerization

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<jats:title>Abstract</jats:title><jats:p>A stable silagermene, 1,1‐bis(tri‐tert‐butylsilyl)‐2,2‐bis(2,4,6‐trimethylphenyl)silagermene, was synthesized by the reaction of dilithiosilane (<jats:sup>t</jats:sup>Bu<jats:sub>3</jats:sub>Si)<jats:sub>2</jats:sub>SiLi<jats:sub>2</jats:sub> with dichlorodimesitylgermane. Its structure was determined by spectroscopic data and X‐ray crystallography, which showed the SiGe length to be 2.2769(8) Å. The silagermene underwent isomerization at 100ˆC to form the corresponding symmetrically substituted isomer (E)‐1,2‐bis(tri‐tert‐butylsilyl)‐1,2‐bis(2,4,6‐trimethylphenyl)silagermene. © 2008 Wiley Periodicals, Inc. Heteroatom Chem 19:649–653, 2008; Published online in Wiley InterScience (<jats:ext-link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="http://www.interscience.wiley.com">www.interscience.wiley.com</jats:ext-link>). DOI 10.1002/hc.20503</jats:p>

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