$[SiF_6]^{2-}$ is known whereas $[SiCl_6]^{2-}$ is not. Give possible reasons.
(N/A) $i$. The size of the $Si^{4+}$ ion is too small to accommodate six large $Cl^-$ ions around it due to steric hindrance.
$ii$. The interaction between the lone pairs of the $Cl^-$ ions and the $Si^{4+}$ ion is not strong enough to stabilize the $[SiCl_6]^{2-}$ complex.
$ii$. The interaction between the lone pairs of the $Cl^-$ ions and the $Si^{4+}$ ion is not strong enough to stabilize the $[SiCl_6]^{2-}$ complex.
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