“Donor–Acceptor” Oligogermanes: Synthesis, Structure, and Electronic Properties

A series of oligogermanes, (Me 3 Si) 3 GeGeCl 3, (C 6 F 5 ) 3 GeGePh 3, (C 6 F 5 ) 3 GeGe( p -Tol) 3, and (C 6 F 5 ) 2 Ge[Ge( p -Tol) 3 ] 2, containing substituents with different electronic properties at neighboring germanium atoms were synthesized. According to X-ray diffraction studies, UV/visible spectroscopy, and quantum chemical calculations, these “donor–acceptor” oligogermanes are characterized by energies of electronic transitions lower than those for other similar compounds.