Silane reaction

I believe the first reaction would be a substitution of $\ce{SiMe3}$ for $\ce{I}$ and creating $\ce{SiMe3Cl}$.

The second process I think would involve the $\ce{Mg}$ removing the two $\ce{Cl}$ and forming diphenylsilane, which would likely be a repeating unit in a silicone polymer.

Could any explain the mechanism for these reactions?

  • $\begingroup$ You are correct about reaction 1, but I have yet to see a mechanism for this $\endgroup$
    – Waylander
    Commented May 21, 2021 at 19:30
  • $\begingroup$ @Waylander Wouldn't the first reaction just be an $\mathrm{S_E Ar}$ ? $\endgroup$
    – S R Maiti
    Commented May 21, 2021 at 20:45
  • $\begingroup$ @ShoubhikRMaiti maybe, but I would like to see a reference that says so $\endgroup$
    – Waylander
    Commented May 21, 2021 at 20:59

1 Answer 1


A)SiMe3 Increases the inductivity and reduces Aromaticity,

so by free radical (uv termination) its likely to have p-iodideSi(Me)3Bencene.

enter image description here

B)Dimer crystal solution in Cl- ions. (Ph)2Si(Cl)Mg+---ClSi(Ph)2

Or Solid crystals of (Ph)2Si(Cl)MgCl. enter image description here


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