Monomeric Alkoxo and Amido Methylnickel(II) Complexes. Synthesis and Heterocumulene Insertion Chemistry

Fluoride displacement from the complex Ni(Me)(F)(dippe) by LiOR or LiNRR‘ provides an efficient
method for the synthesis of the corresponding mononuclear Ni(II) alkoxo or amido complexes. These
complexes undergo addition reactions to heterocumulenes (CO2, PhNCO, PhNCS), leading to the formal
insertion of these molecules into the Ni−O or Ni−N bonds. The dialkylamido complexes decompose
through β-hydrogen elimination processes, which selectively afford η2-imine Ni(0) compounds.