JEE Main20207 Jan 2020Evening ShiftChemistryChemical Bonding and Molecular StructureActual
The bond order and the magnetic characteristic of C N - are
Options
- A2 1 2 , diamagnetic
- B3 , diamagnetic
- C3 , paramagnetic
- D2 1 2 , paramagnetic
Correct answer
B. 3 , diamagnetic
Step-by-step solution
According to MOT (If z is internuclear axis) The configuration of CN − : 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 Bond order = number   of   electrons   in   bonding   orbitals - number   of   electrons   in   anti - bonding   orbitals 2 Bond order  = 1 2 ( 10 − 4 ) = 3 CN − is diamagnetic due to absence of unpaired electron.