11th Class Chemistry Chemical Bonding and Molecular Structure

  • 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


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