Reactivity of organogermanium and organotin trihydrides

The organogermanium and organotin trihydrides (TbbEH(3)) [E = Ge (3), Sn (7)] with the Tbb substituent were synthesized by hydride substitution (Tbb = 2,6-[CH(SiMe3)(2)](2)-4-(t-Bu)C6H2). Deprotonation of the organoelement trihydrides 3 and 7 was studied in reaction with bases MeLi, BnK and LDA (Bn = benzyl, LDA = lithium diisopropylamide) to yield the deprotonation products (8-11) as lithium or potassium salts. Hydride abstraction from TbbSnH(3) using the trityl salt [Ph3C][Al(OC{CF3}(3))(4)] gives the salt [TbbSnH(2])[Al(OC{CF3}(3))(4))] (12) which was stabilized by thf donor ligands [TbbSnH(2)(thf)(2)][Al(OC{CF3}(3))(4)] (13). Tintrihydride 7 reacts with trialkylamine Et2MeN to give as the product of a reductive elimination of hydrogen the distannane (TbbSnH(2))(2) (14). Transfer of hydrogen was observed in reaction of trihydrides TbbEH(3) (E = Ge, Sn) and Ar*GeH3 with N-heterocyclic carbene (NHC). The NHC adduct TbbSnH((NHC)-N-iPr) (15) was synthesized at rt and the germanium hydrides exhibit hydrogen transfer at higher temperatures to give Ar*GeH((NHC)-N-Me) (16) and TbbGeH((NHC)-N-Me) (17).

Automated summary

The synthesis of organogermanium and organotin trihydrides with the Tbb substituent was studied, along with their reactions with bases and deprotonation products. Hydrogen transfer was also observed in certain reactions.