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Keywords:

  • allenes;
  • carbenes;
  • heterocycles;
  • rhodium;
  • Wittig reactions
Thumbnail image of graphical abstract

A highly reactive phosphagermacarbene (PGeHC) was synthesized by [3+2] cycloaddition between phosphagermaallene Tip(tBu)Ge[DOUBLE BOND]C[DOUBLE BOND]PMes* (Tip= 2,4,6-triisopropylphenyl; Mes*=2,4,6-tris-tert-butylphenyl) and diphenylketene. It forms complexes with [{Rh(CO)2Cl}2] and Me3P, and undergoes a Wittig-type reaction with diphenylketene (see scheme).