(4+4)-Coordinate germanium atoms in tetrakis(dialkylaminoxy)germanes

Abstract

The compounds Ge(ONMe₂)₄ and Ge(ONEt₂)₄ were prepared by the reaction of LiONMe₂ and LiONEt₂ with GeCl₄. They were characterized by ¹H and ¹³C NMR and IR spectroscopy, by their decay patterns in the mass spectra, by high-resolution mass spectrometry and by elemental analyses. The crystal structure of Ge(ONMe₂)₄ was determined and shows the compound to have a (4+4) coordinate germanium atom as is evident from the Ge–O–N angles, which are in the range between 100.8(3) and 109.2(4)°, which is on average 15.2° smaller than the Ge–O–C angles in Ge(ONCHMe₂)₄. This compound was also prepared and examined by single crystal X-ray crystallography.