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Keywords:

  • coordinative unsaturation;
  • isocyanide ligands;
  • nickel;
  • protecting groups;
  • thallium

Abstract

Thumbnail image of graphical abstract

Blocking the pass: Low-valent Ni centers readily bind TlI ions in a synthetically reversible fashion. The Tl units, in turn, serve as coordination site protection agents for Ni with respect to incoming Lewis basic ligands. This synthetic sequence allows for the isolation of a reactive zero-valent Ni tris-isocyanide complex.