Question

${O_2}^{-}$ is the superoxide ion and has paramagnetic character.

If this is true enter 1, else enter 0.

Answer 1

Superoxide ion is formed by the addition of one electron to the $O_2$ molecule.

$O_2$$+e^{-}$$⟶$${O_2}^{-}$

The additional electron enters into one of the antibonding orbitals.

The electronic configuration of ${O_2}^{-}$ is:

$\sigma 1s^2$,${\sigma }^{\ast }1s^2$,$\sigma 2s^2$,${\sigma }^{\ast }2s^2$,$\sigma 2p{z}^2$,$\pi 2p{y}^2$,$\pi 2p{x}^2$,${\pi }^{\ast }2p{x}^2$,${\pi }^{\ast }2p{y}^1$.

in this configuration, unpaired electron is present in the anti-bonding orbital. So, it is paramagnetic nature.

So, the correct answer is 1.