Facile Interconversion of [Cp2(Cl)Hf(SnH3)] and [Cp2(Cl)Hf(μ-H)SnH2]: DFT Investigations of Hafnocene Stannyl Complexes as Masked Stannylenes
Résumé
Sn two-step: Dehydrocoupling of stannanes by the d0 complex [Cp2(Cl)HfH] preferentially occurs by two successive reactions (see scheme): -bond metathesis to form [Cp2(Cl)Hf(SnH3)] and subsequent stannylene transfer into the Cp2(Cl)HfSnH3 bond. [Cp2(Cl)Hf(SnH3)] readily isomerizes to a species possessing a reactive stannylene unit, [Cp2(Cl)Hf(-H)SnH2], thus making the stannylene-transfer reaction energetically feasible.