Bulky Phenyl Modifications of the Silanide Ligand Si(SiMe ₃3 ) ₃3 – Synthesis and Reactivity

摘要

> The synthesis and structural characterization of bulkier variations of the very common organometallic compound M Si(SiMe ₃ ) ₃ , namely M Si(SiMe ₃ )(SiPh ₃ ) ₂ 3 and M Si(SiPh ₃ ) ₃ [ M = Li ( 1 ), K ( 5 )] are presented, which can be synthesized via a step by step exchange of SiMe ₃ groups by bulkier SiPh ₃ groups. This synthetic route is high selective and is performed in good yields via the silanes Si(SiMe ₃ ) ₂ (SiPh ₃ ) ₂ ( 2 ) and Si(SiMe ₃ )(SiPh ₃ ) ₃ ( 4 ). Additionally, the corresponding silanes HSi(SiMe ₃ )(SiPh ₃ ) ₂ ( 6 _H ) and HSi(SiPh ₃ ) ₃ ( 7 _H ) are obtained via the reaction of 3 and 5 with aqueous HCl, respectively. Oxidation of 6 _H with CCl ₄ gives the chlorsilane Cl‐Si(SiMe ₃ )(SiPh ₃ ) ₂ ( 6