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  4. Among the following ions the pπ -dπ overlap could be present in

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

Bihar CECEBihar CECE 2012Organic Chemistry – Some Basic Principles and Techniques

Solution:

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.
In nitrogen and carbon no vacant d-orbital is present. So, they do not form $p\pi -d\pi $ bond.

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