Synthesis and Crystal Structures of Monomeric Diamidonickel(II) Complexes

The thermally stable nickel(II) diamides [NIL2] [L = N-(SiMe3)(8-C9H,(6)) (1), N-(SitBuMe(2)) (8-C9H6N) (2)] have been synthesized from the reaction of NiCl2 with the appropriate lithium amide. X-ray crystallography revealed that the amido ligands bind in a chelating manner, forming a distorted tetrahedral environment around the nickel center. Complexes 1 and 2 have magnetic moments of 3.05 and 2.74 mu(B), respectively, which indicate a d(8) electronic configuration with two unpaired electrons.