MCQ
Which of the following is paramagnetic
- ✓${O_2}$
- B$C{N^ - }$
- C$CO$
- D$N{O^ + }$
${O_2} = \sigma {(1s)^2}{\sigma ^ * }{(1s)^2}\sigma {(2s)^2}{\sigma ^ * }{(2s)^2}\sigma {(2{p_x})^2}\pi {(2{p_y})^2}$
$\pi {(2{p_z})^2}{\pi ^ * }{(2{p_y})^1}{\pi ^ * }{(2{p_z})^1}$
The molecule has two unpaired electrons So, it is paramagnetic
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$\left( I \right)A + {e^ - } \to {A^\circleddash }\,\,\,\,\,\,{E^o} = + 0.24\,V$
$\left( {II} \right){B^ - } + {e^ - } \to {B^{ - 2}}\,\,\,\,\,\,{E^o} = + 1.25\,V$
$\left( {III} \right){C^ - } + 2{e^ - } \to {C^{ - 3}}\,\,\,\,\,\,{E^o} = + 0.15\,V$
$\left( {IV} \right)D + 2{e^ - } \to {D^{ - 2}}\,\,\,\,\,\,{E^o} = + 0.68\,V$