Statement-I : $\mathrm{H}_{2}^{-}$is paramagnetic in nature. Statement-II : $\mathrm{H}_{2}^{-}$has

Question

Statement-I : $\mathrm{H}_{2}^{-}$is paramagnetic in nature. Statement-II : $\mathrm{H}_{2}^{-}$has one unpaired electron in antibonding molecular orbital.\

Professor PC Thomas Classes · Answer

(a) : Molecular orbital configuration of $\mathrm{H}_{2}^{-}$is $\sigma l s^{2} \sigma^{*} 1 s^{1}$. $\mathrm{H}_{2}^{-}$has one unpaired electron in its antibonding molecular orbital. Thus, $\mathrm{H}_{2}^{-}$ion is paramagnetic in nature.\