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Chemistry Question on Chemical bonding and molecular structure

The pairs of species of oxygen and their magnetic behaviours are noted below. Which of the following presents the correct description ?

A

O,O22−O , O^{2-}_2 - Both paramagnetic

B

O2−,O22−O^-_2 , O^{2-}_2 - Both diamagnetic

C

O+,O22−O^+ , O^{2-}_2 - Both paramagnetic

D

O2+,O2O^+_2 , O_2 - Both paramagnetic

Answer

O2+,O2O^+_2 , O_2 - Both paramagnetic

Explanation

Solution

O2+=KKσ2s2  σ∗2s2  σ2pz2(π2px2=π2py2)(π∗2px1){ O_2^+ = KK \sigma 2 s^2 \, \, \sigma^{\ast} 2s^2 \, \, \sigma 2 p_z^2 (\pi 2 p_x^2 = \pi 2 p_y^2) (\pi^{\ast} 2 p_x^1)}
O2=KKσ2s2  σ∗2s2  σ2pz2(π2px2=π2py2)(π∗2px1=π∗2py1){ O_2 = KK \sigma 2 s^2 \, \, \sigma^{\ast} 2s^2 \, \, \sigma 2 p_z^2 (\pi 2 p_x^2 = \pi 2 p_y^2) (\pi^{\ast} 2 p_x^1 = \pi^{\ast} 2 p_y^1)}
O2O_2 and O2+O_2^+ contain unpaired electron in π∗\pi^{\ast} ABMO so paramagnetic.