Question
In which of the following ionization processes, the bond order has increased and the magnetic behaviour has changed?
A.
$${N_2} \to N_2^ + $$
B.
$$\,{C_2} \to C_2^ + \,$$
C.
$$NO \to N{O^ + }$$
D.
$${O_2} \to O_2^ + $$
Answer :
$$NO \to N{O^ + }$$
Solution :
$$\eqalign{
& ({\text{A}})\,\,{N_2}:\,\,{\text{bond}}\,{\text{order}}\,\,3,\,\,{\text{paramagnetic}} \cr
& \,\,\,\,\,\,\,\,{\text{ }}N_2^ - :\,{\text{bond}}\,{\text{order}}\,2.5,\,{\text{paramagnetic}} \cr
& ({\text{B}})\,{C_2}\,:\,{\text{bond}}\,{\text{order}}\,2,\,{\text{diamagnetic}} \cr
& \,\,\,\,\,\,\,\,\,C_2^ + :\,{\text{bond}}\,{\text{order}}\,1.5,\,{\text{paramagnetic}} \cr
& ({\text{C}})\,NO:\,{\text{bond}}\,{\text{order}}\,2.5,\,{\text{paramagnetic}} \cr
& \,\,\,\,\,\,\,\,N{O^ + }:\,{\text{bond}}\,{\text{order}}\,3,\,{\text{diamagnetic}} \cr
& ({\text{D}})\,{O_2}:\,{\text{bond}}\,{\text{order}}\,2,\,{\text{paramagnetic}} \cr
& \,\,\,\,\,\,\,\,\,O_2^ + :\,{\text{bond}}\,{\text{order}}\,2.5,\,{\text{paramagnetic}} \cr} $$