An Isolable Three‐Coordinate Germanone and Its Reactivity

  • Xuan‐Xuan Zhao
    Department of Chemistry WACKER-Institute of Silicon Chemistry and Catalysis Research Center Technische Universität München Lichtenbergstraße 4 85748 Garching bei München Germany
  • Tibor Szilvási
    Department of Chemical and Biological Engineering University of Alabama Tuscaloosa AL 35487 USA
  • Franziska Hanusch
    Department of Chemistry WACKER-Institute of Silicon Chemistry and Catalysis Research Center Technische Universität München Lichtenbergstraße 4 85748 Garching bei München Germany
  • Shigeyoshi Inoue
    Department of Chemistry WACKER-Institute of Silicon Chemistry and Catalysis Research Center Technische Universität München Lichtenbergstraße 4 85748 Garching bei München Germany

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<jats:title>Abstract</jats:title><jats:p>A rare three‐coordinate germanone [IPrN]<jats:sub>2</jats:sub>Ge=O (IPrN=bis(2,6‐diisopropylphenyl)imidazolin‐2‐imino) was successfully isolated. The germanone has a rather high thermal stability in arene solvent, and no detectable change was observed at 80 °C for at least one week. However, high thermal stability of [IPrN]<jats:sub>2</jats:sub>Ge=O does not prevent its reactivity toward small molecules. Structural analysis and initial reactivity studies revealed the highly polarized nature of the terminal Ge=O bond. Besides, the addition of phenylacetylene, as well as O‐atom transfer with 2,6‐dimethylphenyl isocyanide make it a mimic of nucleophilic transition‐metal oxides. Mechanism for O‐atom transfer reaction was investigated via DFT calculations, which revealed that the reaction proceeds via a [2+2] cycloaddition intermediate.</jats:p>

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