PCl_5 exists but NCl_5 does not because | vedclass

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Question

(A) . Nitrogen does not have vacant $d-$orbitals,so it cannot expand its octet to form $5$ covalent bonds.$P$ (Phosphorus) has vacant $3d-$orbitals,al

Vedclass · Accepted Answer

Nitrogen has no vacant $d-$orbitals

Vedclass · Answer

(A) . Nitrogen does not have vacant $d-$orbitals,so it cannot expand its octet to form $5$ covalent bonds.$P$ (Phosphorus) has vacant $3d-$orbitals,allowing it to exhibit a $+5$ oxidation state and form $PCl_5$.Since Nitrogen lacks $d-$orbitals,it is restricted to a maximum covalency of $4$,which is why $NCl_5$ does not exist.

$PCl_5$ exists but $NCl_5$ does not because

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