Which one of the following species does not e | vedclass

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(A) Carbon belongs to the second period and has a maximum covalency of $4$ because it lacks $d$-orbitals in its valence shell. Therefore,it cannot exp

Vedclass · Accepted Answer

$[CCl_6]^{2-}$

Vedclass · Answer

(A) Carbon belongs to the second period and has a maximum covalency of $4$ because it lacks $d$-orbitals in its valence shell. Therefore,it cannot expand its octet to form a hexacoordinated species like $[CCl_6]^{2-}$. Silicon,Germanium,and Tin belong to the third,fourth,and fifth periods respectively,and they possess vacant $d$-orbitals,allowing them to form stable octahedral complexes like $[SiF_6]^{2-}$,$[GeF_6]^{2-}$,and $[SnCl_6]^{2-}$.

Which one of the following species does not exist?

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