Question: Which one of the following compounds of Group-14 elements is not known?
$\left[\mathrm{GeCl}_{6}\right]^{2-}$
$\left[\mathrm{Sn}(\mathrm{OH})_{6}\right]^{2-}$
$\left[\mathrm{SiCl}_{6}\right]^{2-}$
$\left[\mathrm{SiF}_{6}\right]^{2-}$
Correct Option: , 3
Solution:
$\left[\mathrm{SiCl}_{6}\right]^{2-}$ does not exist due to steric crowding of surrounding atoms.
