Question

On the basis of LCAO-MO theory, the magnetic characteristics of $N_2$ and $N_2^{+}$ are

• A. Both diamagnetic
• B. Both paramagnetic
• C. $N_2$ diamagnetic and $N_2^{+}$ paramagnetic
• D. $N_2$ paramagnetic and $N_2^{+}$ dimagnetic

Answer 1

The correct option is C

$N_2$ diamagnetic and $N_2^{+}$ paramagnetic

$N_2\left(14\right):\sigma 1s^2{\sigma }^{\ast }1s^2\sigma 2s^2{\sigma }^{\ast }2s^2\pi 2p_x^2\pi 2p_y^2\sigma 2p_z^2$

$\Rightarrow \text{Diamagnetic}$

$N_2^{+}\left(13\right):\sigma 1s^2{\sigma }^{\ast }1s^2\sigma 2s^2{\sigma }^{\ast }2s^2\pi 2p_x^2\pi 2p_y^2\sigma 2p_z^1$

$\Rightarrow \text{Paramagnetic}$