In analogy to the proverbially uplifting influence of energy drinks, electron-withdrawing substituents like perfluoroorganyl groups can also boost the performance of element compounds.
For example, pentafluoroethyl groups are very useful to increase the Lewis acidity and for the stabilization of molecules with extraordinary bonding situations. Furthermore, these
compounds in general exhibit a comparatively low boiling point, so that C2
groups even lend heavy metals, like bismuth, wings!
In their Full Paper
, B. Hoge et al. report on an efficient method for the preparation of pentafluoroethyl bismuth compounds using LiC2
generated either by the deprotonation
-BuLi or the combination of P(C2