Chemical Bonding and Molecular Structure - Result Question 105
####107. During change of $O_2$ to $O_2^{-}$ion, the electron adds on which one of the following orbitals?
[2012 M]
(a) $\pi^{*}$ orbital
(b) $\pi$ orbital
(c) $\sigma^{*}$ orbital
(d) $\sigma$ orbital
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Solution:
- (a) $O_2=K K(\sigma 2 s)^{2}(\sigma^{*} 2 s)^{2}(\sigma 2 p_z)^{2}$
$(\pi 2 p_x)^{2}(\pi 2 p_y)^{2}(\pi^{} 2 p_x)^{1}(\pi^{} 2 p_y)^{1}$
$O_2^{-}=K K(\sigma 2 s)^{2}(\sigma^{*} 2 s)^{2}(\sigma 2 p_z)^{2}$
$(\pi 2 p_x)^{2}(\pi 2 p_y)^{2}(\pi^{} 2 p_x)^{2}(\pi^{} 2 p_y)^{1}$
