Chemical Bonding and Molecular Structure - Result Question 110
####113. According to MO theory which of the following lists ranks the nitrogen species in terms of increasing bond order?
[2009]
(a)
(b)
(c)
(d)
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Solution:
- (a) Molecular orbital configuration of
$N_2^{2-}=\sigma 1 s^{2} \sigma^{} 1 s^{2} \sigma 2 s^{2} \sigma^{} 2 s^{2}-$
$
{\begin{array} { l }
{ \pi 2 p _ { y } ^ { 2 } } \
{ \pi 2 p _ { z } ^ { 2 } }
\end{matrix} \sigma \sigma 2 p _ { x } ^ { 2 } {
Bond order
$N_2^{-}=\sigma 1 s^{2} \sigma^{} 1 s^{2} \sigma 2 s^{2} \sigma^{} 2 s^{2}$
$
{\begin{array} { l }
{ \pi 2 p _ { y } ^ { 2 } } \
{ \pi 2 p _ { z } ^ { 2 } }
\end{matrix} \quad \sigma 2 p _ { x } ^ { 2 } {
Bond order
$N_2=\sigma 1 s^{2} \sigma^{} 1 s^{2} \sigma 2 s^{2} \sigma^{} 2 s^{2}
Bond order
