JEE Main2014ChemistryChemical Bonding and Molecular StructureActual
Which of the following has unpaired electron(s)?
Options
- AO 2 -
- BN 2 2 +
- CO 2 2 -
- DN 2
Correct answer
A. O 2 -
Step-by-step solution
The Molecular orbital electronic configurations are O 2 − ⇒ σ 1 s 2 < σ * 1 s 2 < σ 2 s 2 < σ * 2 s 2 < σ 2 p z 2 < π 2 p x 2 = π 2 p y 2 < π * 2 p x 2 = π * 2 p y 1 (unpaired electron) N 2 2 + ⇒ σ 1 s 2 < σ * 1 s 2 < σ 2 s 2 < σ * 2 s 2 < π 2 p x 2 = π 2 p y 2 < σ 2 p z 0 O 2 2 − ⇒ σ 1 s 2 < σ * 1 s 2 < σ 2 s 2 < σ * 2 s 2 < σ 2 p z 2 < π 2 p x 2 = π 2 p y 2 < π * 2 p x 2 = π * 2 p y 2 N 2 ⇒ σ 1 s 2 < σ * 1 s 2 < σ 2 s 2 < σ * 2 s 2 < π 2 p x 2 = π 2 p y 2 < σ 2 p z 2