Chemical Bonding And Molecular Structure Ques 98

98. Among the following ions the $p \pi-d \pi$ overlap could be present in

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(a) $NO_2^{-}$

(b) $NO_3^{-}$

(c) $PO_4^{3-}$

(d) $CO_3^{2-}$

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Answer:

Correct Answer: 98.(c)

Solution:

(c) In $P-O$ bond, $\pi$ bond is formed by the sidewise overlapping of $d$-orbital of $P$ and $p$ orbital of oxygen. Hence it is formed by $p \pi$ and $d \pi$ overlapping.