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  • Why does  overlap not contribute to bonding? <div class='qna-opt

Why does \mathrm{2 s-2 p_y } overlap not contribute to bonding? 

Option: 1

The \mathrm{2 s} and \mathrm{2 p_y} orbitals have different symmetries.
 


Option: 2

The constructive overlap in one region is exactly cancelled by the effect of the destructive overlap in the other.
 


Option: 3

The \mathrm{2 s} and \mathrm{2 p_y} orbitals are too far apart to overlap effectively.
 


Option: 4

The \mathrm{2 s } and \mathrm{2 p_y} orbitals do not have the same energy.


Answers (1)

best_answer

The correct answer is \mathrm{B}. The constructive overlap in one region is exactly cancelled by the effect of the destructive overlap in the other. This is because the \mathrm{2 s} and \mathrm{2 p_y} orbitals have different phases, which means that the wavefunctions destructively interfere in some regions and constructively interfere in others.

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vinayak

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