文摘
The synthesis of the first linear coordinated CuII complex Cu{N(SiMe3)Dipp}2 (1 Dipp=C6H5-2,6Pri2) and its CuI counterpart [Cu{N(SiMe3)Dipp}2]− (2) is described. The formation of 1 proceeds through a dispersion force-driven disproportionation, and is the reaction product of a CuI halide and LiN(SiMe3)Dipp in a non-donor solvent. The synthesis of 2 is accomplished by preventing the disproportionation into 1 by using the complexing agent 15-crown-5. EPR spectroscopy of 1 provides the first detailed study of a two-coordinate transition-metal complex indicating strong covalency in the Cu−N bonds.