question_answer

                Among the following ions the \[p\pi -d\pi \] overlap could be present in:                                             

A)                 \[NO_{2}^{-}\] 

B)                 \[NO_{3}^{-}\] 

C)                 \[PO_{4}^{3-}\]

D)                 \[CO_{3}^{2-}\]

Correct Answer: C

Solution :

                                In P?O bond, it bond is formed by the sidewise overlapping of d-orbital of P and p-orbital of oxygen. Hence, it is formed by \[p\pi -d\pi \] overlapping.                 In nitrogen and carbon no vacant d-orbital is present. So, they do not form \[p\pi -d\pi \] bond