Shristy posted an Question
September 24, 2021 • 20:49 pm 30 points
  • IIT JAM
  • Chemistry (CY)

Lewis acidity of silicon tetrahalides [sif sicl, sibr, sil] decreases in the order (1) sil,> sibr, > sicl,> sif, 3) sif, > sicl, > sibr,> sil, (2) sil,> sicl,>

Lewis acidity of silicon tetrahalides [SiF SiCl, SiBr, Sil] decreases in the order (1) Sil,> SiBr, > Sicl,> SiF, 3) SiF, > SiCl, > SiBr,> Sil, (2) Sil,> SiCl,> SiBr,> SiF (4) SiF, > SiBr > Sil, > SiCl, (3)

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    Paramjeet verma Best Answer

    In case of silicone halides inductive effect dominate over back bonding hence Lewis acid character decided by inductive effect. ( In case of Boron halides order is reverse as back bonding is dominated over inductive effect) Hence order of Lewis acid character decreases as: SiF4 > SiCl4 > SiBr4 > SiI4

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