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  4. Which of the following has p π-d π bonding?

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Q. Which of the following has $p \pi-d \pi$ bonding?

Punjab PMETPunjab PMET 2007Chemical Bonding and Molecular Structure

Solution:

$N , B$, and $C$ are the elements of second period. These elements cannot form $p \pi-d \pi$ bonds as they do not possess $d-$ orbitals in their valence shell. On the other hand, $S$, an element of third period has, $3 d$ orbitals and, hence, can form $p \pi-d \pi$ bonds with oxygen. In this bonding, the $d-$ orbitals of S overlap with the $p$ - orbitals of the $O$ atom.