Chemical Bonding And Molecular Structure Question 304
Question: In which of the following ionization processes, the bond order has increased and the magnetic behavior has changed-
Options:
A) $ C_2\to {C^{+}}_2 $
B) $ NO\to N{O^{+}} $
C) $ O_2\to {O^{+}}_2 $
D) $ N_2\to {N^{+}}_2 $
Show Answer
Answer:
Correct Answer: B
Solution:
- (1) $ C_2: $ Bond order 2 diamagnetic.
$ {C^{+}}_2: $ Bond order 1.5 paramagnetic.
(2) $ NO: $ Bond order 2.5 paramagnetic.
$ N{O^{+}}: $ Bond order 3 diamagnetic.
(3) $ O_2: $ Bond order 2 paramagnetic.
$ {O^{+}}_2: $ Bond order 2.5 paramagnetic.
(4) $ N_2: $ Bond order 3 paramagnetic.
$ {N^{-}}_2: $ Bond order 2.5 diamagnetic.
Thus, in $ NO\to N{O^{+}} $ , electron is removed form antibonding molecular orbital, hence bond order increases and nature changes form paramagnetic to diamagnetic.
