Synthetic, structural and theoretical studies of amidinate and guanidinate stabilised germanium(I) dimers

摘要

The neutral germanium( I) dimers, [{Ge(Piso)}(2)] and [{Ge(Giso)}(2)], Piso = [(ArN)(2)CBut](-), Giso = [(ArN)(2)-CNPr2i](-), Ar = C6H3Pr2i-2,6, which are stabilised by bulky amidinate and guanidinate ligands respectively, have been prepared by reduction of the corresponding germanium(II) chlorides, [Ge(Piso)Cl] and [Ge(Giso) Cl]; theoretical studies suggest that the Ge-Ge bonds of [{Ge(Piso)}(2)] and [{Ge(Giso)}(2)] are associated with their HOMOs, whilst their LUMOs have substantial Ge-Ge pi-bonding character.