Question

In \[\ce{O^-2}\], O₂, and \[\ce{O^{2-}2}\] molecular species, the total number of antibonding electrons, respectively, are:

विकल्प

• 7, 6, 8

• 1, 0, 2

• 6, 6, 6

• 8, 6, 8

Answer 1

7, 6, 8

Explanation:

Molecular orbital electronic configurations of these species are:

\[\ce{O^-2 (17 e^-) = σ 1 s^2σ^* 1s^2σ 2s^2σ^* 2s^2σ 2p^2_z π 2p^2_x}\]

= \[π2\text{p}^2_y π^*2\text{p}^2_λ\]

= \[π^*2\text{p}^1_y\]

\[\ce{O2 (16 e^-) = σ 1 s^2σ^* 1s^2σ 2s^2σ^* 2s^2σ 2p^2_z π 2p^2_x}\]

= \[π2\text{p}^2_y π^*2\text{p}^1_x\]

= \[π^*2\text{p}^1_y\]

\[\ce{O^{2-}2 (18 e^-) = σ 1 s^2σ^* 1s^2σ 2s^2σ^* 2s^2σ 2p^2_z π 2p^2_x}\]

= \[π2\text{p}^2_y π^*2\text{p}^2_x\]

= \[π^*2\text{p}^2_y\]

Hence, the number of antibonding electrons are 7, 6 and 8 respectively.