question_answer 84)

  What is the effect of the following processes on the bond order in \[{{N}_{2}}\]and\[{{O}_{2}}\]? (i) \[{{N}_{2}}\to N_{2}^{+}+{{e}^{-}}\] (ii) \[{{O}_{2}}\to O_{2}^{+}+{{e}^{-}}\]

Answer:

 

Species	Total electrons	Configuration
\[{{N}_{2}}\]	14	\[KK\sigma {{(2s)}^{2}}{{\sigma }^{*}}{{(2s)}^{2}}\pi {{(2{{p}_{x}})}^{2}}\]\[\pi {{(2{{p}_{y}})}^{2}}\sigma {{(2{{p}_{z}})}^{2}}\]	\[\frac{8-2}{2}=3\]
\[N_{2}^{+}\]	13	\[KK\sigma {{(2s)}^{2}}{{\sigma }^{*}}{{(2s)}^{2}}\pi {{(2{{p}_{x}})}^{2}}\]\[\pi {{(2{{p}_{y}})}^{2}}\sigma {{(2{{p}_{z}})}^{1}}\]	\[\frac{7-2}{2}=2.5\]
Bond order decreases from 3 to 2.5
\[{{O}_{2}}\]	16	\[KK\sigma {{(2s)}^{2}}{{\sigma }^{*}}{{(2s)}^{2}}\sigma {{(2{{p}_{z}})}^{2}}\pi {{(2{{p}_{x}})}^{2}}\]\[\pi {{(2{{p}_{y}})}^{2}}{{\pi }^{*}}{{(2{{p}_{x}})}^{1}}\pi {{(2{{p}_{y}})}^{1}}\]	\[\frac{8-4}{2}=2.0\]
\[O_{2}^{+}\]	15	\[KK\sigma {{(2s)}^{2}}{{\sigma }^{*}}{{(2s)}^{2}}\sigma {{(2{{p}_{Z}})}^{2}}\pi {{(2{{p}_{x}})}^{2}}\]\[\pi {{(2{{p}_{y}})}^{2}}{{\pi }^{*}}{{(2{{p}_{x}})}^{1}}\]	\[\frac{8-3}{2}=2.5\]
Bond order increases from 2 to 2.5