Scheme 1. The members of the triad 1H₂/Li[1H]/Li₂[1] are linked through redox processes as well as protonation/deprotonation reactions. Treatment of 1H₂ with RCH₂Li leads to C(sp³)–H activations and skeletal rearrangements to furnish 1,1-bis(9-borafluorenyl)methanes (together with Li[1H]; R = H, C₃H₇). The addition of haloalkanes RX to Li₂[1] results in nucleophilic substitution reactions and again skeletal rearrangements to afford 9-R-9-borafluorenes (in some cases accompanied by C(sp³)–H activations; X = Cl, Br, I). Carbon atoms marked with asterisks bear tBu substituents.