Study of the structure of organogermanium compounds with the aid of Ge～73 NMR Spectroscopy

High-resolution solid-state MAS ^Ge NMR spectra of hexavalent germanium compounds, i.e., diiodogermylene (la) and bis(1-pyrrolyl)(meso-tetraphenylporphyrinato) germanium (3a) were determined. To the best of our knowledge, this is the first example of high-resolution solid-state ^Ge NMR spectra of hexacoordinated germanium nuclei