Germylenes and Germyl Cations with the 2,4-Di-tert-butyl-6-(N,N-dimethylaminomethyl)phenyl Ligand

The 2,4-di-tert-butyl-6-(N,N-dimethylaminomethyl)phenyl (Mamx) ligand allows the synthesis of the germylenes MamxGeCl (I), Mamx(2)Ge (2), Mamx(Tip)Ge (3; Tip = 2,4,6-iPr(3)C(6)H(2)), MamxGeN(3) (4), MamxGeN(SiMe3)(2) (5), and MamxGe[Fe(CO)(2)Cp*] (6), which are all stabilized by coordination of the amino side chain. Reactions of 2 and 3 with Mel yield the ionic compounds Mamx(Tip)(Me)Ge+I-(7) and Mamx(2)(Me)Ge+I- (8), respectively; the X-ray crystal structure of 7 shows a trigonal-planar coordination at the Ge center and a nearly perpendicular Ge-N bond.