Absorption and emission of germylenes (germanediyls); their complexation

Abstract

Germylenes, R₂Ge: (R = Me or Ph), show broad electronic absorption bands with λ_max in the region of 416–464 nm; weak fluorescence peaks in the region of 620–651 nm at 77 K, and a large Stokes shift, attributed to a conformational change in the C–Ge–C bond angle between the ground and the lowest excited singlet state; UV–VIS spectra provide evidence for the interaction of dimethylgermylene with the π-system of arylated germanium precursors.