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Journal of the American Chemical Society, Vol.128, No.3, 1023-1031, 2006
Synthesis and properties of a new kinetically stabilized digermyne: New insights for a germanium analogue of an alkyne
The reduction of an overcrowded (E)-1,2-dibromodigermene, Bbt(Br)Ge=Ge(Br)Bbt (2) [Bbt = 2,6-bis[bis(trimethylsilyl)methyl]-4-[tris(trimethylsilyl)methyl]phenyl] , with KC8 afforded a stable digermyne, BbtGe&3bond; GeBbt (1). The Ge&3bond; Ge triple-bond characters of 1 were revealed by the X-ray crystallographic analysis and spectroscopic studies (UV/vis and Raman spectra) together with theoretical calculations. The Ge&3bond; Ge bond lengths of the two nonidentical molecules of 1 observed in the unit cell were shorter than that of the previously reported digermyne, Ar'Ge&3bond; GeAr' (Ar' = 2,6-Dip(2)C(6)H(3), Dip = 2,6-diisopropylphenyl).