Question

According to MO theory which of thhe following lists makes the nitrogen species in terms of increasing bond order?
A. `N_(2)^(-) lt N_(2)^(2-) lt N_(2)`
B. `N_(2)^(-) lt N_(2) lt N_(2)^(2-) `
C. `N_(2)^(2-) lt N_(2)^(2-) lt N_(2)`
D. `N_(2) lt N_(2)^(2-) lt N_(2)^(-) `

Answer 1

Correct Answer - c
B.O. of `N_(2) = (8 - 2)/(2) = 3`
B.O. of `N_(2)^(-) = (8 - 3)/(2) = (5)/(2)=2.5`
B.O. of `N_(2)^(2-) = (8 - 4)/(2) = 2`
Therefore increasing bond order is `N_(underset(2)(2))^(2-)ltN_(underset(2.5)(2))^(-)ltN_(underset(3)(2)).`