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Valence Bond Theory

Write the mol...

Question

Write the molecular orbital configuration of N₂ and N₂⁺ . Also calculate their bond order?

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Solution

Orbital configuration of N₂
$σ 1 s^{2}, σ * 1 s^{2}, σ 2 s^{2}, σ * 2 s^{2}, π 2 {p_{y}}^{2} \approx π 2 {p_{z}}^{2}, σ 2 {p_{x}}^{2}$

Orbital configuration of N₂⁺
$σ 1 s^{2}, σ * 1 s^{2}, σ 2 s^{2}, σ * 2 s^{2}, π 2 {p_{y}}^{2} \approx π 2 {p_{z}}^{2}, σ 2 {p_{x}}^{1}$

Bond order = $\frac{(n o . o f e l e c t r o n s i n b o n d i n g o r b i t a l s - n o . o f e l e c t r o n s i n a n t i b o n d i n g o r b i t a l s)}{2}$

Bond order of N₂ = $\frac{(10 - 4)}{2} = 3$

Bond order of N₂⁺ = $\frac{(9 - 4)}{2} = 2.5$

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