Synthesis and structures of aryloxo- and binaphthoxogermanium(IV) alkyl iodide complexes

The germanium(II) aryloxide complexes (S)-[Ge{O2C20H10-(SiMe2Ph)2-3,3′}{NH3}] (1) and [Ge(OC6H3Ph2-2,6)2] (2) react with either ButI or MeI to yield the corresponding germanium(IV) compounds (S)-[Ge{O2C20H10-(SiMe2Ph)2-3,3′}{But}{I}] (3), (S)-[Ge{O2C20H10-(SiMe2Ph)2-3,3′}{Me}{I}] (4), [Ge(OC6H3Ph2-2,6)2(But)(I)] (5), and [Ge(OC6H3Ph2-2,6)2(Me)(I)] (6). Compound 6 reacts with 2,6-diphenylphenol to yield [Ge(OC6H3Ph2-2,6)3(Me)] (7), while 3–5 do not. The X-ray crystal structures of 3–5 and 7 were determined, and 3–5 represent the first structurally characterized germanium(IV) species having germanium bound to both oxygen and iodine.