The bond order and the magnetic characteristics of

Question:

The bond order and the magnetic characteristics of $\mathrm{CN}^{-}$are:

  1. $2 \frac{1}{2}$, diamagnetic

  2. 3 , diamagnetic

  3. 3 , paramagnetic

  4. $2 \frac{1}{2}$, paramagnetic


Correct Option: , 2

Solution:

Total number of electrons in $\mathrm{CN}^{-}=6+7+1=14$

$\therefore$ Molecular orbital distribution

$\therefore$ Bond order $=\frac{10-4}{2}=3$

$\mathrm{CN}^{-}$is diamagnetic because all electrons are paired.

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