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  4. The calculated bond order of superoxide ion (O2- ) is

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Q. The calculated bond order of superoxide ion $(O_2^- )$ is

KCETKCET 2008Chemical Bonding and Molecular Structure

Solution:

The $MO$ configuration of superoxide ion,

$(O^-_2 (8 + 8 + 1 =17) = \sigma1s^2 ,\overset{*}{\sigma} 1s^2 ,\sigma2s^2, \overset{*}{\sigma}2s^2 , \sigma 2p_z^2 \approx \pi 2p^2_y , \approx \pi 2p^2_y , \overset{*}{\pi} 2p^2_x \approx \overset{*}{\pi} 2p^1_y )$

$ B.O = \frac {N_b -N_a}{2} = \frac {10 - 7}{2} = \frac {3}{2} = 1.5 $