Chemical BondingHard

Question

Which of the following is para-magnetic ?

Options

A.NO+
B.CO
C.O2-
D.CN-

Solution

O2- → 15 e- contains one unpaired e- in ABMO.
 σ1s2σ*1s2 σ2s2 σ*2s2 σ2pz2 π2px2 = π2py2 π*

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