Coordination Chemistry of Ene-1,1-diamines and a Prototype "Carbodicarbene"

Carbophilic Lewis acids can polarize a coordinated π‐bond by a slippage mechanism. A series of stable ylid‐ or enolate gold complexes of ene‐1,1‐diamines not only emulate this property, but also reveal the exceptional donor capacity of such electron‐rich olefin ligands. Moreover, the first metal complex of a tetraaminoallene is reported, which features a prototype “carbodicarbene” ligand bound to a transition‐metal template.