Nickel is an earth-abundant metal that enables a wide range of otherwise difficult bond-forming and bond-breaking reactions. Sterically encumbering N-heterocyclic carbene (NHC) ligands support nickel in low coordination numbers and low-oxidation states. This presentation will describe a three-electron half-bond between nickel(I) and nickel(0), and the formation of nonmetal- and metal-bridged dinickel complexes. These complexes include nickel alkoxides and fluorides, and clusters featuring nickel-gallium and nickel-zinc bonding.

Unusual metal-metal and metal-element bonds in low-valent dinickel complexes

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