Disilene Fluoride Adducts versus β-Halooligosilanides

Area of Science:

• Organosilicon Chemistry
• Inorganic Chemistry

Background:

• Previous studies explored disilene fluoride adducts.
• The synthesis of novel silicon-containing compounds is an active area of research.

Purpose of the Study:

• To investigate the formation and properties of 1,1-bis(trimethylsilyl)fluorodiphenylsilylsilanide.
• To compare the structural, spectroscopic, and reactivity features of the new compound with related disilene fluoride adducts.

Main Methods:

• Reaction of (Me₃Si)₃SiSiPh₂F with potassium tert-butoxide (KO^tBu).
• Characterization using spectroscopic techniques.
• Reactions with magnesium bromide (MgBr₂) and analysis of products.

Main Results:

• Formation of FPh₂SiSi(Me₃Si)₂K with distinct structural and spectroscopic properties compared to F(Me₃Si)₂SiSi(SiMe₃)₂K.
• FPh₂SiSi(Me₃Si)₂K reacts with MgBr₂ to form a magnesium silanide, unlike the metal fluoride elimination seen with F(Me₃Si)₂SiSi(SiMe₃)₂K.
• Reaction of (Me₃Si)₃SiSiPh₂Cl yields ClPh₂SiSi(Me₃Si)₂K, which eliminates KCl to form the disilene Ph₂Si═Si(SiMe₃)₂.

Conclusions:

• FPh₂SiSi(Me₃Si)₂K is identified as a β-fluorodisilanide, distinct from disilene fluoride adducts.
• The reactivity patterns of these novel silanides offer insights into silicon-carbon bond chemistry.
• This work expands the known chemistry of silicon anions and disilenes.