Copper(I) complexes of fluorinated triazapentadienyl ligands:: Synthesis and characterization of [N{(C3F7)C(Dipp)N}2]CuL (where L = NCCH3, CNBut, CO; Dipp=2,6-diisopropylphenyl)

Sterically demanding triazapentadiene [N{(C3F7)C(Dipp)N}(2)] H has been synthesized in good yield. It features a W-shaped ligand backbone in the solid state. [N{(C3F7)C(Dipp)N}(2)]H reacts with copper(l) oxide in acetonitrile leading to [N{(C3F7)C(Dipp)N}(2)]CuNCCH3. This copper adduct serves as an excellent precursor to obtain thermally stable [N{(C3F7)C(Dipp)N}(2)]CuCNBut and [N{(C3F7)C(Dipp)N}(2)]CUCO, IR spectroscopic data of these copper(1) isocyanide (v(CN) = 2176 cm(-1)) and copper(1) carbonyl (v(CO) = 2109 cm(-1)) complexes indicate that the [N{(C3F7)C(Dipp)N}(2)](-) ligand is a fairly weak donor.