Question

What is the bond order for the carbon-nitrogen bond in acetonitrile, CH3CN? 2.2.0 03.0.5 C. 3.0 d. 1.5 0.1.0

Answer 1

Answer:

C. 3.0

Explanation:

Bond order is number of the bonding pairs of the electrons between two atoms.

For $CH_3CN$,

The total number of the valence electrons  = 2(4) + 1(5) + 3(1) = 16

The Lewis structure is drawn in such a way that the octet of each atom and duet for the hydrogen in the molecule is complete. So,  

The Lewis structure is:

          H

           :                  

H   :    C   :   C   :  :  :   N :

           :

          H

Bond pairs between C and N is 3

So bond pair is 3.

Answer 2

Answer:

C. 3.0

Explanation:

To determine the bond order between carbon and nitrogen in acetonitrile, we need to consider the Lewis structure.

N has 5 valence electrons, so it shares 3 pairs of electrons to reach the octet.

C has 4 valence electrons, so it shares 4 pairs of electrons to reach the octet.

As we can see, in the Lewis structure there is a triple bond between C and N. The corresponding bond order is 3.0.